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Finding the Fourth Proportional to 28,397.96, 42,603.62 and 8,678.10

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Solution

The fourth proportional to 28,397.96, 42,603.62 and 8,678.10 is: 13,019.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,397.96 : 42,603.62 = 8,678.10 : x
  2. Step 2: Convert to fraction form
    28,397.96/42,603.62 = 8,678.10/x
  3. Step 3: Cross multiply
    28,397.96x = 42,603.62 × 8,678.10
  4. Step 4: Simplify right side
    28,397.96x = 369,718,431.33
  5. Step 5: Solve for x
    x = 369,718,431.33/28,397.96
  6. Step 6: Final answer
    x = 13,019.19

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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.