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Finding the Fourth Proportional to 28,398.96, 42,597.09 and 9,678.24

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Solution

The fourth proportional to 28,398.96, 42,597.09 and 9,678.24 is: 14,516.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398.96 : 42,597.09 = 9,678.24 : x
  2. Step 2: Convert to fraction form
    28,398.96/42,597.09 = 9,678.24/x
  3. Step 3: Cross multiply
    28,398.96x = 42,597.09 × 9,678.24
  4. Step 4: Simplify right side
    28,398.96x = 412,264,860.32
  5. Step 5: Solve for x
    x = 412,264,860.32/28,398.96
  6. Step 6: Final answer
    x = 14,516.90

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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.