Home / 22,151.92-30,572.40-12,720.28

Finding the Fourth Proportional to 22,151.92, 30,572.40 and 12,720.28

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Solution

The fourth proportional to 22,151.92, 30,572.40 and 12,720.28 is: 17,555.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,151.92 : 30,572.40 = 12,720.28 : x
  2. Step 2: Convert to fraction form
    22,151.92/30,572.40 = 12,720.28/x
  3. Step 3: Cross multiply
    22,151.92x = 30,572.40 × 12,720.28
  4. Step 4: Simplify right side
    22,151.92x = 388,889,488.27
  5. Step 5: Solve for x
    x = 388,889,488.27/22,151.92
  6. Step 6: Final answer
    x = 17,555.57

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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.