Home / 12,612.40-18,886.20-9,307.60

Finding the Fourth Proportional to 12,612.40, 18,886.20 and 9,307.60

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Solution

The fourth proportional to 12,612.40, 18,886.20 and 9,307.60 is: 13,937.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.40 : 18,886.20 = 9,307.60 : x
  2. Step 2: Convert to fraction form
    12,612.40/18,886.20 = 9,307.60/x
  3. Step 3: Cross multiply
    12,612.40x = 18,886.20 × 9,307.60
  4. Step 4: Simplify right side
    12,612.40x = 175,785,195.12
  5. Step 5: Solve for x
    x = 175,785,195.12/12,612.40
  6. Step 6: Final answer
    x = 13,937.49

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Similar ratio
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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.