Home / 15,123.40-20,871.94-8,663.65

Finding the Fourth Proportional to 15,123.40, 20,871.94 and 8,663.65

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Solution

The fourth proportional to 15,123.40, 20,871.94 and 8,663.65 is: 11,956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.40 : 20,871.94 = 8,663.65 : x
  2. Step 2: Convert to fraction form
    15,123.40/20,871.94 = 8,663.65/x
  3. Step 3: Cross multiply
    15,123.40x = 20,871.94 × 8,663.65
  4. Step 4: Simplify right side
    15,123.40x = 180,827,182.98
  5. Step 5: Solve for x
    x = 180,827,182.98/15,123.40
  6. Step 6: Final answer
    x = 11,956.78

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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.