Home / 13,309.40-18,375.53-8,280.47

Finding the Fourth Proportional to 13,309.40, 18,375.53 and 8,280.47

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Solution

The fourth proportional to 13,309.40, 18,375.53 and 8,280.47 is: 11,432.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,309.40 : 18,375.53 = 8,280.47 : x
  2. Step 2: Convert to fraction form
    13,309.40/18,375.53 = 8,280.47/x
  3. Step 3: Cross multiply
    13,309.40x = 18,375.53 × 8,280.47
  4. Step 4: Simplify right side
    13,309.40x = 152,157,891.62
  5. Step 5: Solve for x
    x = 152,157,891.62/13,309.40
  6. Step 6: Final answer
    x = 11,432.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.