Home / 15,020.53-20,720.47-12,191.10

Finding the Fourth Proportional to 15,020.53, 20,720.47 and 12,191.10

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Solution

The fourth proportional to 15,020.53, 20,720.47 and 12,191.10 is: 16,817.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.53 : 20,720.47 = 12,191.10 : x
  2. Step 2: Convert to fraction form
    15,020.53/20,720.47 = 12,191.10/x
  3. Step 3: Cross multiply
    15,020.53x = 20,720.47 × 12,191.10
  4. Step 4: Simplify right side
    15,020.53x = 252,605,321.82
  5. Step 5: Solve for x
    x = 252,605,321.82/15,020.53
  6. Step 6: Final answer
    x = 16,817.34

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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.