Home / 15,123.31-20,867.11-8,834.47

Finding the Fourth Proportional to 15,123.31, 20,867.11 and 8,834.47

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Solution

The fourth proportional to 15,123.31, 20,867.11 and 8,834.47 is: 12,189.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.31 : 20,867.11 = 8,834.47 : x
  2. Step 2: Convert to fraction form
    15,123.31/20,867.11 = 8,834.47/x
  3. Step 3: Cross multiply
    15,123.31x = 20,867.11 × 8,834.47
  4. Step 4: Simplify right side
    15,123.31x = 184,349,783.03
  5. Step 5: Solve for x
    x = 184,349,783.03/15,123.31
  6. Step 6: Final answer
    x = 12,189.78

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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.