Home / 18,363.90-25,342.20-9,980.40

Finding the Fourth Proportional to 18,363.90, 25,342.20 and 9,980.40

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Solution

The fourth proportional to 18,363.90, 25,342.20 and 9,980.40 is: 13,772.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,363.90 : 25,342.20 = 9,980.40 : x
  2. Step 2: Convert to fraction form
    18,363.90/25,342.20 = 9,980.40/x
  3. Step 3: Cross multiply
    18,363.90x = 25,342.20 × 9,980.40
  4. Step 4: Simplify right side
    18,363.90x = 252,925,292.88
  5. Step 5: Solve for x
    x = 252,925,292.88/18,363.90
  6. Step 6: Final answer
    x = 13,772.96

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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.