Home / 10,082.80-15,124.20-9,985.60

Finding the Fourth Proportional to 10,082.80, 15,124.20 and 9,985.60

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Solution

The fourth proportional to 10,082.80, 15,124.20 and 9,985.60 is: 14,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,082.80 : 15,124.20 = 9,985.60 : x
  2. Step 2: Convert to fraction form
    10,082.80/15,124.20 = 9,985.60/x
  3. Step 3: Cross multiply
    10,082.80x = 15,124.20 × 9,985.60
  4. Step 4: Simplify right side
    10,082.80x = 151,024,211.52
  5. Step 5: Solve for x
    x = 151,024,211.52/10,082.80
  6. Step 6: Final answer
    x = 14,978.40

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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.