Home / 12,730.86-17,575.90-8,480.78

Finding the Fourth Proportional to 12,730.86, 17,575.90 and 8,480.78

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Solution

The fourth proportional to 12,730.86, 17,575.90 and 8,480.78 is: 11,708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,730.86 : 17,575.90 = 8,480.78 : x
  2. Step 2: Convert to fraction form
    12,730.86/17,575.90 = 8,480.78/x
  3. Step 3: Cross multiply
    12,730.86x = 17,575.90 × 8,480.78
  4. Step 4: Simplify right side
    12,730.86x = 149,057,341.20
  5. Step 5: Solve for x
    x = 149,057,341.20/12,730.86
  6. Step 6: Final answer
    x = 11,708.35

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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.