Home / 28,143.22-42,220.72-10,612.92

Finding the Fourth Proportional to 28,143.22, 42,220.72 and 10,612.92

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Solution

The fourth proportional to 28,143.22, 42,220.72 and 10,612.92 is: 15,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.22 : 42,220.72 = 10,612.92 : x
  2. Step 2: Convert to fraction form
    28,143.22/42,220.72 = 10,612.92/x
  3. Step 3: Cross multiply
    28,143.22x = 42,220.72 × 10,612.92
  4. Step 4: Simplify right side
    28,143.22x = 448,085,123.70
  5. Step 5: Solve for x
    x = 448,085,123.70/28,143.22
  6. Step 6: Final answer
    x = 15,921.60

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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.