Home / 15,787.18-21,785.46-9,818.68

Finding the Fourth Proportional to 15,787.18, 21,785.46 and 9,818.68

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Solution

The fourth proportional to 15,787.18, 21,785.46 and 9,818.68 is: 13,549.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.18 : 21,785.46 = 9,818.68 : x
  2. Step 2: Convert to fraction form
    15,787.18/21,785.46 = 9,818.68/x
  3. Step 3: Cross multiply
    15,787.18x = 21,785.46 × 9,818.68
  4. Step 4: Simplify right side
    15,787.18x = 213,904,460.39
  5. Step 5: Solve for x
    x = 213,904,460.39/15,787.18
  6. Step 6: Final answer
    x = 13,549.25

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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.