Home / 20,013.28-30,031.80-8,920.60

Finding the Fourth Proportional to 20,013.28, 30,031.80 and 8,920.60

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Solution

The fourth proportional to 20,013.28, 30,031.80 and 8,920.60 is: 13,386.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,013.28 : 30,031.80 = 8,920.60 : x
  2. Step 2: Convert to fraction form
    20,013.28/30,031.80 = 8,920.60/x
  3. Step 3: Cross multiply
    20,013.28x = 30,031.80 × 8,920.60
  4. Step 4: Simplify right side
    20,013.28x = 267,901,675.08
  5. Step 5: Solve for x
    x = 267,901,675.08/20,013.28
  6. Step 6: Final answer
    x = 13,386.20

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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.