Home / 25,720.20-35,486.10-15,103.80

Finding the Fourth Proportional to 25,720.20, 35,486.10 and 15,103.80

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Solution

The fourth proportional to 25,720.20, 35,486.10 and 15,103.80 is: 20,838.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,720.20 : 35,486.10 = 15,103.80 : x
  2. Step 2: Convert to fraction form
    25,720.20/35,486.10 = 15,103.80/x
  3. Step 3: Cross multiply
    25,720.20x = 35,486.10 × 15,103.80
  4. Step 4: Simplify right side
    25,720.20x = 535,974,957.18
  5. Step 5: Solve for x
    x = 535,974,957.18/25,720.20
  6. Step 6: Final answer
    x = 20,838.68

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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.