Home / 12,445.20-17,115.53-9,897.35

Finding the Fourth Proportional to 12,445.20, 17,115.53 and 9,897.35

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Solution

The fourth proportional to 12,445.20, 17,115.53 and 9,897.35 is: 13,611.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.20 : 17,115.53 = 9,897.35 : x
  2. Step 2: Convert to fraction form
    12,445.20/17,115.53 = 9,897.35/x
  3. Step 3: Cross multiply
    12,445.20x = 17,115.53 × 9,897.35
  4. Step 4: Simplify right side
    12,445.20x = 169,398,255.78
  5. Step 5: Solve for x
    x = 169,398,255.78/12,445.20
  6. Step 6: Final answer
    x = 13,611.53

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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.