Home / 10,386.40-15,543.15-7,105.90

Finding the Fourth Proportional to 10,386.40, 15,543.15 and 7,105.90

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Solution

The fourth proportional to 10,386.40, 15,543.15 and 7,105.90 is: 10,633.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,386.40 : 15,543.15 = 7,105.90 : x
  2. Step 2: Convert to fraction form
    10,386.40/15,543.15 = 7,105.90/x
  3. Step 3: Cross multiply
    10,386.40x = 15,543.15 × 7,105.90
  4. Step 4: Simplify right side
    10,386.40x = 110,448,069.59
  5. Step 5: Solve for x
    x = 110,448,069.59/10,386.40
  6. Step 6: Final answer
    x = 10,633.91

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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.