Home / 10,280.20-15,420.30-9,718.60

Finding the Fourth Proportional to 10,280.20, 15,420.30 and 9,718.60

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Solution

The fourth proportional to 10,280.20, 15,420.30 and 9,718.60 is: 14,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,280.20 : 15,420.30 = 9,718.60 : x
  2. Step 2: Convert to fraction form
    10,280.20/15,420.30 = 9,718.60/x
  3. Step 3: Cross multiply
    10,280.20x = 15,420.30 × 9,718.60
  4. Step 4: Simplify right side
    10,280.20x = 149,863,727.58
  5. Step 5: Solve for x
    x = 149,863,727.58/10,280.20
  6. Step 6: Final answer
    x = 14,577.90

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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.