Home / 18,531.08-25,571.85-10,978.13

Finding the Fourth Proportional to 18,531.08, 25,571.85 and 10,978.13

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Solution

The fourth proportional to 18,531.08, 25,571.85 and 10,978.13 is: 15,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531.08 : 25,571.85 = 10,978.13 : x
  2. Step 2: Convert to fraction form
    18,531.08/25,571.85 = 10,978.13/x
  3. Step 3: Cross multiply
    18,531.08x = 25,571.85 × 10,978.13
  4. Step 4: Simplify right side
    18,531.08x = 280,731,178.15
  5. Step 5: Solve for x
    x = 280,731,178.15/18,531.08
  6. Step 6: Final answer
    x = 15,149.21

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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.