Home / 25,621.18-38,434.20-8,985.40

Finding the Fourth Proportional to 25,621.18, 38,434.20 and 8,985.40

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Solution

The fourth proportional to 25,621.18, 38,434.20 and 8,985.40 is: 13,478.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,621.18 : 38,434.20 = 8,985.40 : x
  2. Step 2: Convert to fraction form
    25,621.18/38,434.20 = 8,985.40/x
  3. Step 3: Cross multiply
    25,621.18x = 38,434.20 × 8,985.40
  4. Step 4: Simplify right side
    25,621.18x = 345,346,660.68
  5. Step 5: Solve for x
    x = 345,346,660.68/25,621.18
  6. Step 6: Final answer
    x = 13,478.95

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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.