Home / 22,720.72-34,085.40-7,142.80

Finding the Fourth Proportional to 22,720.72, 34,085.40 and 7,142.80

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Solution

The fourth proportional to 22,720.72, 34,085.40 and 7,142.80 is: 10,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,720.72 : 34,085.40 = 7,142.80 : x
  2. Step 2: Convert to fraction form
    22,720.72/34,085.40 = 7,142.80/x
  3. Step 3: Cross multiply
    22,720.72x = 34,085.40 × 7,142.80
  4. Step 4: Simplify right side
    22,720.72x = 243,465,195.12
  5. Step 5: Solve for x
    x = 243,465,195.12/22,720.72
  6. Step 6: Final answer
    x = 10,715.56

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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.