Home / 10,280.80-15,421.20-9,187.30

Finding the Fourth Proportional to 10,280.80, 15,421.20 and 9,187.30

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Solution

The fourth proportional to 10,280.80, 15,421.20 and 9,187.30 is: 13,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,280.80 : 15,421.20 = 9,187.30 : x
  2. Step 2: Convert to fraction form
    10,280.80/15,421.20 = 9,187.30/x
  3. Step 3: Cross multiply
    10,280.80x = 15,421.20 × 9,187.30
  4. Step 4: Simplify right side
    10,280.80x = 141,679,190.76
  5. Step 5: Solve for x
    x = 141,679,190.76/10,280.80
  6. Step 6: Final answer
    x = 13,780.95

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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.