Home / 28,367.28-39,159-20,306.16

Finding the Fourth Proportional to 28,367.28, 39,159 and 20,306.16

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Solution

The fourth proportional to 28,367.28, 39,159 and 20,306.16 is: 28,031.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,367.28 : 39,159 = 20,306.16 : x
  2. Step 2: Convert to fraction form
    28,367.28/39,159 = 20,306.16/x
  3. Step 3: Cross multiply
    28,367.28x = 39,159 × 20,306.16
  4. Step 4: Simplify right side
    28,367.28x = 795,168,919.44
  5. Step 5: Solve for x
    x = 795,168,919.44/28,367.28
  6. Step 6: Final answer
    x = 28,031.20

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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.