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Finding the Fourth Proportional to 20,462.60, 28,238.12 and 11,510.10

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Solution

The fourth proportional to 20,462.60, 28,238.12 and 11,510.10 is: 15,883.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,462.60 : 28,238.12 = 11,510.10 : x
  2. Step 2: Convert to fraction form
    20,462.60/28,238.12 = 11,510.10/x
  3. Step 3: Cross multiply
    20,462.60x = 28,238.12 × 11,510.10
  4. Step 4: Simplify right side
    20,462.60x = 325,023,570.62
  5. Step 5: Solve for x
    x = 325,023,570.62/20,462.60
  6. Step 6: Final answer
    x = 15,883.79

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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.