Home / 15,129.86-20,878.83-8,755.56

Finding the Fourth Proportional to 15,129.86, 20,878.83 and 8,755.56

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Solution

The fourth proportional to 15,129.86, 20,878.83 and 8,755.56 is: 12,082.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.86 : 20,878.83 = 8,755.56 : x
  2. Step 2: Convert to fraction form
    15,129.86/20,878.83 = 8,755.56/x
  3. Step 3: Cross multiply
    15,129.86x = 20,878.83 × 8,755.56
  4. Step 4: Simplify right side
    15,129.86x = 182,805,848.79
  5. Step 5: Solve for x
    x = 182,805,848.79/15,129.86
  6. Step 6: Final answer
    x = 12,082.46

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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.