Home / 10,306.40-15,478.56-5,379.36

Finding the Fourth Proportional to 10,306.40, 15,478.56 and 5,379.36

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Solution

The fourth proportional to 10,306.40, 15,478.56 and 5,379.36 is: 8,078.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,306.40 : 15,478.56 = 5,379.36 : x
  2. Step 2: Convert to fraction form
    10,306.40/15,478.56 = 5,379.36/x
  3. Step 3: Cross multiply
    10,306.40x = 15,478.56 × 5,379.36
  4. Step 4: Simplify right side
    10,306.40x = 83,264,746.52
  5. Step 5: Solve for x
    x = 83,264,746.52/10,306.40
  6. Step 6: Final answer
    x = 8,078.94

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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.