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Finding the Fourth Proportional to 28,491.68, 42,734.28 and 7,713.56

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Solution

The fourth proportional to 28,491.68, 42,734.28 and 7,713.56 is: 11,569.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.68 : 42,734.28 = 7,713.56 : x
  2. Step 2: Convert to fraction form
    28,491.68/42,734.28 = 7,713.56/x
  3. Step 3: Cross multiply
    28,491.68x = 42,734.28 × 7,713.56
  4. Step 4: Simplify right side
    28,491.68x = 329,633,568.60
  5. Step 5: Solve for x
    x = 329,633,568.60/28,491.68
  6. Step 6: Final answer
    x = 11,569.47

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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.