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Finding the Fourth Proportional to 38,420.04, 53,019.18 and 21,653.04

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Solution

The fourth proportional to 38,420.04, 53,019.18 and 21,653.04 is: 29,880.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,420.04 : 53,019.18 = 21,653.04 : x
  2. Step 2: Convert to fraction form
    38,420.04/53,019.18 = 21,653.04/x
  3. Step 3: Cross multiply
    38,420.04x = 53,019.18 × 21,653.04
  4. Step 4: Simplify right side
    38,420.04x = 1,148,026,425.31
  5. Step 5: Solve for x
    x = 1,148,026,425.31/38,420.04
  6. Step 6: Final answer
    x = 29,880.93

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Half 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.