Home / 20,820.10-31,244.55-14,980.90

Finding the Fourth Proportional to 20,820.10, 31,244.55 and 14,980.90

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Solution

The fourth proportional to 20,820.10, 31,244.55 and 14,980.90 is: 22,481.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.10 : 31,244.55 = 14,980.90 : x
  2. Step 2: Convert to fraction form
    20,820.10/31,244.55 = 14,980.90/x
  3. Step 3: Cross multiply
    20,820.10x = 31,244.55 × 14,980.90
  4. Step 4: Simplify right side
    20,820.10x = 468,071,479.10
  5. Step 5: Solve for x
    x = 468,071,479.10/20,820.10
  6. Step 6: Final answer
    x = 22,481.71

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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.