Home / 20,787.64-31,153.86-9,088.12

Finding the Fourth Proportional to 20,787.64, 31,153.86 and 9,088.12

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Solution

The fourth proportional to 20,787.64, 31,153.86 and 9,088.12 is: 13,620.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.64 : 31,153.86 = 9,088.12 : x
  2. Step 2: Convert to fraction form
    20,787.64/31,153.86 = 9,088.12/x
  3. Step 3: Cross multiply
    20,787.64x = 31,153.86 × 9,088.12
  4. Step 4: Simplify right side
    20,787.64x = 283,130,018.14
  5. Step 5: Solve for x
    x = 283,130,018.14/20,787.64
  6. Step 6: Final answer
    x = 13,620.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.