Home / 8,981.28-12,398.47-5,625.86

Finding the Fourth Proportional to 8,981.28, 12,398.47 and 5,625.86

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Solution

The fourth proportional to 8,981.28, 12,398.47 and 5,625.86 is: 7,766.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.28 : 12,398.47 = 5,625.86 : x
  2. Step 2: Convert to fraction form
    8,981.28/12,398.47 = 5,625.86/x
  3. Step 3: Cross multiply
    8,981.28x = 12,398.47 × 5,625.86
  4. Step 4: Simplify right side
    8,981.28x = 69,751,980.38
  5. Step 5: Solve for x
    x = 69,751,980.38/8,981.28
  6. Step 6: Final answer
    x = 7,766.37

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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.