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Finding the Fourth Proportional to 28,107, 38,787.66 and 16,931.16

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Solution

The fourth proportional to 28,107, 38,787.66 and 16,931.16 is: 23,365.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107 : 38,787.66 = 16,931.16 : x
  2. Step 2: Convert to fraction form
    28,107/38,787.66 = 16,931.16/x
  3. Step 3: Cross multiply
    28,107x = 38,787.66 × 16,931.16
  4. Step 4: Simplify right side
    28,107x = 656,720,077.49
  5. Step 5: Solve for x
    x = 656,720,077.49/28,107
  6. Step 6: Final answer
    x = 23,365.00

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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.