Home / 20,638.16-28,479.90-11,206.52

Finding the Fourth Proportional to 20,638.16, 28,479.90 and 11,206.52

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Solution

The fourth proportional to 20,638.16, 28,479.90 and 11,206.52 is: 15,464.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.16 : 28,479.90 = 11,206.52 : x
  2. Step 2: Convert to fraction form
    20,638.16/28,479.90 = 11,206.52/x
  3. Step 3: Cross multiply
    20,638.16x = 28,479.90 × 11,206.52
  4. Step 4: Simplify right side
    20,638.16x = 319,160,568.95
  5. Step 5: Solve for x
    x = 319,160,568.95/20,638.16
  6. Step 6: Final answer
    x = 15,464.58

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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.