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Finding the Fourth Proportional to 38,203.65, 52,721.49 and 21,208.23

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Solution

The fourth proportional to 38,203.65, 52,721.49 and 21,208.23 is: 29,267.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,203.65 : 52,721.49 = 21,208.23 : x
  2. Step 2: Convert to fraction form
    38,203.65/52,721.49 = 21,208.23/x
  3. Step 3: Cross multiply
    38,203.65x = 52,721.49 × 21,208.23
  4. Step 4: Simplify right side
    38,203.65x = 1,118,129,485.86
  5. Step 5: Solve for x
    x = 1,118,129,485.86/38,203.65
  6. Step 6: Final answer
    x = 29,267.61

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Half scale
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Double scale
Find fourth proportional to 38,204.65, 52,722.87 and 21,209.23
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.