Home / 12,397.86-18,585.86-9,215.78

Finding the Fourth Proportional to 12,397.86, 18,585.86 and 9,215.78

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Solution

The fourth proportional to 12,397.86, 18,585.86 and 9,215.78 is: 13,815.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,397.86 : 18,585.86 = 9,215.78 : x
  2. Step 2: Convert to fraction form
    12,397.86/18,585.86 = 9,215.78/x
  3. Step 3: Cross multiply
    12,397.86x = 18,585.86 × 9,215.78
  4. Step 4: Simplify right side
    12,397.86x = 171,283,057.86
  5. Step 5: Solve for x
    x = 171,283,057.86/12,397.86
  6. Step 6: Final answer
    x = 13,815.53

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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.