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Finding the Fourth Proportional to 28,345.68, 42,524.28 and 9,890.64

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Solution

The fourth proportional to 28,345.68, 42,524.28 and 9,890.64 is: 14,837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.68 : 42,524.28 = 9,890.64 : x
  2. Step 2: Convert to fraction form
    28,345.68/42,524.28 = 9,890.64/x
  3. Step 3: Cross multiply
    28,345.68x = 42,524.28 × 9,890.64
  4. Step 4: Simplify right side
    28,345.68x = 420,592,344.74
  5. Step 5: Solve for x
    x = 420,592,344.74/28,345.68
  6. Step 6: Final answer
    x = 14,837.97

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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.