Home / 22,151.85-30,572.28-12,720.21

Finding the Fourth Proportional to 22,151.85, 30,572.28 and 12,720.21

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Solution

The fourth proportional to 22,151.85, 30,572.28 and 12,720.21 is: 17,555.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,151.85 : 30,572.28 = 12,720.21 : x
  2. Step 2: Convert to fraction form
    22,151.85/30,572.28 = 12,720.21/x
  3. Step 3: Cross multiply
    22,151.85x = 30,572.28 × 12,720.21
  4. Step 4: Simplify right side
    22,151.85x = 388,885,821.78
  5. Step 5: Solve for x
    x = 388,885,821.78/22,151.85
  6. Step 6: Final answer
    x = 17,555.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.