Home / 10,666.19-15,974.85-5,123.45

Finding the Fourth Proportional to 10,666.19, 15,974.85 and 5,123.45

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Solution

The fourth proportional to 10,666.19, 15,974.85 and 5,123.45 is: 7,673.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,666.19 : 15,974.85 = 5,123.45 : x
  2. Step 2: Convert to fraction form
    10,666.19/15,974.85 = 5,123.45/x
  3. Step 3: Cross multiply
    10,666.19x = 15,974.85 × 5,123.45
  4. Step 4: Simplify right side
    10,666.19x = 81,846,345.23
  5. Step 5: Solve for x
    x = 81,846,345.23/10,666.19
  6. Step 6: Final answer
    x = 7,673.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.