Home / 10,143.33-15,138.15-9,306.60

Finding the Fourth Proportional to 10,143.33, 15,138.15 and 9,306.60

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Solution

The fourth proportional to 10,143.33, 15,138.15 and 9,306.60 is: 13,889.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,143.33 : 15,138.15 = 9,306.60 : x
  2. Step 2: Convert to fraction form
    10,143.33/15,138.15 = 9,306.60/x
  3. Step 3: Cross multiply
    10,143.33x = 15,138.15 × 9,306.60
  4. Step 4: Simplify right side
    10,143.33x = 140,884,706.79
  5. Step 5: Solve for x
    x = 140,884,706.79/10,143.33
  6. Step 6: Final answer
    x = 13,889.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.