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Finding the Fourth Proportional to 12,335.80, 18,540.15 and 12,117.10

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Solution

The fourth proportional to 12,335.80, 18,540.15 and 12,117.10 is: 18,211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,335.80 : 18,540.15 = 12,117.10 : x
  2. Step 2: Convert to fraction form
    12,335.80/18,540.15 = 12,117.10/x
  3. Step 3: Cross multiply
    12,335.80x = 18,540.15 × 12,117.10
  4. Step 4: Simplify right side
    12,335.80x = 224,652,851.57
  5. Step 5: Solve for x
    x = 224,652,851.57/12,335.80
  6. Step 6: Final answer
    x = 18,211.45

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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.