Home / 13,938.60-20,924.10-8,398.20

Finding the Fourth Proportional to 13,938.60, 20,924.10 and 8,398.20

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Solution

The fourth proportional to 13,938.60, 20,924.10 and 8,398.20 is: 12,607.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.60 : 20,924.10 = 8,398.20 : x
  2. Step 2: Convert to fraction form
    13,938.60/20,924.10 = 8,398.20/x
  3. Step 3: Cross multiply
    13,938.60x = 20,924.10 × 8,398.20
  4. Step 4: Simplify right side
    13,938.60x = 175,724,776.62
  5. Step 5: Solve for x
    x = 175,724,776.62/13,938.60
  6. Step 6: Final answer
    x = 12,607.06

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1.5x scale

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.