Home / 12,431.52-17,146.80-8,445.74

Finding the Fourth Proportional to 12,431.52, 17,146.80 and 8,445.74

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Solution

The fourth proportional to 12,431.52, 17,146.80 and 8,445.74 is: 11,649.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.52 : 17,146.80 = 8,445.74 : x
  2. Step 2: Convert to fraction form
    12,431.52/17,146.80 = 8,445.74/x
  3. Step 3: Cross multiply
    12,431.52x = 17,146.80 × 8,445.74
  4. Step 4: Simplify right side
    12,431.52x = 144,817,328.90
  5. Step 5: Solve for x
    x = 144,817,328.90/12,431.52
  6. Step 6: Final answer
    x = 11,649.21

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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.