Home / 25,385.40-38,005.20-15,543.90

Finding the Fourth Proportional to 25,385.40, 38,005.20 and 15,543.90

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Solution

The fourth proportional to 25,385.40, 38,005.20 and 15,543.90 is: 23,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,385.40 : 38,005.20 = 15,543.90 : x
  2. Step 2: Convert to fraction form
    25,385.40/38,005.20 = 15,543.90/x
  3. Step 3: Cross multiply
    25,385.40x = 38,005.20 × 15,543.90
  4. Step 4: Simplify right side
    25,385.40x = 590,749,028.28
  5. Step 5: Solve for x
    x = 590,749,028.28/25,385.40
  6. Step 6: Final answer
    x = 23,271.21

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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.