Home / 13,572.80-20,330.40-8,907.20

Finding the Fourth Proportional to 13,572.80, 20,330.40 and 8,907.20

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Solution

The fourth proportional to 13,572.80, 20,330.40 and 8,907.20 is: 13,341.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.80 : 20,330.40 = 8,907.20 : x
  2. Step 2: Convert to fraction form
    13,572.80/20,330.40 = 8,907.20/x
  3. Step 3: Cross multiply
    13,572.80x = 20,330.40 × 8,907.20
  4. Step 4: Simplify right side
    13,572.80x = 181,086,938.88
  5. Step 5: Solve for x
    x = 181,086,938.88/13,572.80
  6. Step 6: Final answer
    x = 13,341.90

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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.