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Finding the Fourth Proportional to 18,700.64, 25,806.76 and 10,317.12

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Solution

The fourth proportional to 18,700.64, 25,806.76 and 10,317.12 is: 14,237.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.64 : 25,806.76 = 10,317.12 : x
  2. Step 2: Convert to fraction form
    18,700.64/25,806.76 = 10,317.12/x
  3. Step 3: Cross multiply
    18,700.64x = 25,806.76 × 10,317.12
  4. Step 4: Simplify right side
    18,700.64x = 266,251,439.73
  5. Step 5: Solve for x
    x = 266,251,439.73/18,700.64
  6. Step 6: Final answer
    x = 14,237.56

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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.