Home / 33,130.68-45,730.61-20,387.76

Finding the Fourth Proportional to 33,130.68, 45,730.61 and 20,387.76

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Solution

The fourth proportional to 33,130.68, 45,730.61 and 20,387.76 is: 28,141.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,130.68 : 45,730.61 = 20,387.76 : x
  2. Step 2: Convert to fraction form
    33,130.68/45,730.61 = 20,387.76/x
  3. Step 3: Cross multiply
    33,130.68x = 45,730.61 × 20,387.76
  4. Step 4: Simplify right side
    33,130.68x = 932,344,701.33
  5. Step 5: Solve for x
    x = 932,344,701.33/33,130.68
  6. Step 6: Final answer
    x = 28,141.43

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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.