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Finding the Fourth Proportional to 15,787.04, 21,785.79 and 8,617.10

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Solution

The fourth proportional to 15,787.04, 21,785.79 and 8,617.10 is: 11,891.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.04 : 21,785.79 = 8,617.10 : x
  2. Step 2: Convert to fraction form
    15,787.04/21,785.79 = 8,617.10/x
  3. Step 3: Cross multiply
    15,787.04x = 21,785.79 × 8,617.10
  4. Step 4: Simplify right side
    15,787.04x = 187,730,178.99
  5. Step 5: Solve for x
    x = 187,730,178.99/15,787.04
  6. Step 6: Final answer
    x = 11,891.41

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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.