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Finding the Fourth Proportional to 18,856.91, 28,295.18 and 7,615.02

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Solution

The fourth proportional to 18,856.91, 28,295.18 and 7,615.02 is: 11,426.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.91 : 28,295.18 = 7,615.02 : x
  2. Step 2: Convert to fraction form
    18,856.91/28,295.18 = 7,615.02/x
  3. Step 3: Cross multiply
    18,856.91x = 28,295.18 × 7,615.02
  4. Step 4: Simplify right side
    18,856.91x = 215,468,323.53
  5. Step 5: Solve for x
    x = 215,468,323.53/18,856.91
  6. Step 6: Final answer
    x = 11,426.49

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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.