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Finding the Fourth Proportional to 18,713.17, 28,069.80 and 4,862.17

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Solution

The fourth proportional to 18,713.17, 28,069.80 and 4,862.17 is: 7,293.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.17 : 28,069.80 = 4,862.17 : x
  2. Step 2: Convert to fraction form
    18,713.17/28,069.80 = 4,862.17/x
  3. Step 3: Cross multiply
    18,713.17x = 28,069.80 × 4,862.17
  4. Step 4: Simplify right side
    18,713.17x = 136,480,139.47
  5. Step 5: Solve for x
    x = 136,480,139.47/18,713.17
  6. Step 6: Final answer
    x = 7,293.27

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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.