Home / 20,009.20-29,989.80-8,892.40

Finding the Fourth Proportional to 20,009.20, 29,989.80 and 8,892.40

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Solution

The fourth proportional to 20,009.20, 29,989.80 and 8,892.40 is: 13,327.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.20 : 29,989.80 = 8,892.40 : x
  2. Step 2: Convert to fraction form
    20,009.20/29,989.80 = 8,892.40/x
  3. Step 3: Cross multiply
    20,009.20x = 29,989.80 × 8,892.40
  4. Step 4: Simplify right side
    20,009.20x = 266,681,297.52
  5. Step 5: Solve for x
    x = 266,681,297.52/20,009.20
  6. Step 6: Final answer
    x = 13,327.93

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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.