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Finding the Fourth Proportional to 18,713.40, 28,045.81 and 7,607.17

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Solution

The fourth proportional to 18,713.40, 28,045.81 and 7,607.17 is: 11,400.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.40 : 28,045.81 = 7,607.17 : x
  2. Step 2: Convert to fraction form
    18,713.40/28,045.81 = 7,607.17/x
  3. Step 3: Cross multiply
    18,713.40x = 28,045.81 × 7,607.17
  4. Step 4: Simplify right side
    18,713.40x = 213,349,244.46
  5. Step 5: Solve for x
    x = 213,349,244.46/18,713.40
  6. Step 6: Final answer
    x = 11,400.88

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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.