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Finding the Fourth Proportional to 21,776.76, 30,051.92 and 11,840.76

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Solution

The fourth proportional to 21,776.76, 30,051.92 and 11,840.76 is: 16,340.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,776.76 : 30,051.92 = 11,840.76 : x
  2. Step 2: Convert to fraction form
    21,776.76/30,051.92 = 11,840.76/x
  3. Step 3: Cross multiply
    21,776.76x = 30,051.92 × 11,840.76
  4. Step 4: Simplify right side
    21,776.76x = 355,837,572.26
  5. Step 5: Solve for x
    x = 355,837,572.26/21,776.76
  6. Step 6: Final answer
    x = 16,340.24

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Half scale
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Double scale
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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.