Home / 20,215.10-30,322.65-19,307.90

Finding the Fourth Proportional to 20,215.10, 30,322.65 and 19,307.90

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Solution

The fourth proportional to 20,215.10, 30,322.65 and 19,307.90 is: 28,961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.10 : 30,322.65 = 19,307.90 : x
  2. Step 2: Convert to fraction form
    20,215.10/30,322.65 = 19,307.90/x
  3. Step 3: Cross multiply
    20,215.10x = 30,322.65 × 19,307.90
  4. Step 4: Simplify right side
    20,215.10x = 585,466,693.94
  5. Step 5: Solve for x
    x = 585,466,693.94/20,215.10
  6. Step 6: Final answer
    x = 28,961.85

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Similar ratio
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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.