Home / 20,720.20-31,094.70-9,041.80

Finding the Fourth Proportional to 20,720.20, 31,094.70 and 9,041.80

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Solution

The fourth proportional to 20,720.20, 31,094.70 and 9,041.80 is: 13,568.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.20 : 31,094.70 = 9,041.80 : x
  2. Step 2: Convert to fraction form
    20,720.20/31,094.70 = 9,041.80/x
  3. Step 3: Cross multiply
    20,720.20x = 31,094.70 × 9,041.80
  4. Step 4: Simplify right side
    20,720.20x = 281,152,058.46
  5. Step 5: Solve for x
    x = 281,152,058.46/20,720.20
  6. Step 6: Final answer
    x = 13,568.98

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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.