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Finding the Fourth Proportional to 18,765.40, 25,892.84 and 10,807.16

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Solution

The fourth proportional to 18,765.40, 25,892.84 and 10,807.16 is: 14,911.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.40 : 25,892.84 = 10,807.16 : x
  2. Step 2: Convert to fraction form
    18,765.40/25,892.84 = 10,807.16/x
  3. Step 3: Cross multiply
    18,765.40x = 25,892.84 × 10,807.16
  4. Step 4: Simplify right side
    18,765.40x = 279,828,064.73
  5. Step 5: Solve for x
    x = 279,828,064.73/18,765.40
  6. Step 6: Final answer
    x = 14,911.92

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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.