Home / 33,129.68-45,729.23-20,386.76

Finding the Fourth Proportional to 33,129.68, 45,729.23 and 20,386.76

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Solution

The fourth proportional to 33,129.68, 45,729.23 and 20,386.76 is: 28,140.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,129.68 : 45,729.23 = 20,386.76 : x
  2. Step 2: Convert to fraction form
    33,129.68/45,729.23 = 20,386.76/x
  3. Step 3: Cross multiply
    33,129.68x = 45,729.23 × 20,386.76
  4. Step 4: Simplify right side
    33,129.68x = 932,270,506.41
  5. Step 5: Solve for x
    x = 932,270,506.41/33,129.68
  6. Step 6: Final answer
    x = 28,140.04

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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.