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Finding the Fourth Proportional to 28,240.92, 38,978.01 and 16,303.55

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Solution

The fourth proportional to 28,240.92, 38,978.01 and 16,303.55 is: 22,502.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.92 : 38,978.01 = 16,303.55 : x
  2. Step 2: Convert to fraction form
    28,240.92/38,978.01 = 16,303.55/x
  3. Step 3: Cross multiply
    28,240.92x = 38,978.01 × 16,303.55
  4. Step 4: Simplify right side
    28,240.92x = 635,479,740.05
  5. Step 5: Solve for x
    x = 635,479,740.05/28,240.92
  6. Step 6: Final answer
    x = 22,502.09

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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.