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Finding the Fourth Proportional to 20,462.74, 28,238.74 and 11,510.16

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Solution

The fourth proportional to 20,462.74, 28,238.74 and 11,510.16 is: 15,884.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,462.74 : 28,238.74 = 11,510.16 : x
  2. Step 2: Convert to fraction form
    20,462.74/28,238.74 = 11,510.16/x
  3. Step 3: Cross multiply
    20,462.74x = 28,238.74 × 11,510.16
  4. Step 4: Simplify right side
    20,462.74x = 325,032,415.60
  5. Step 5: Solve for x
    x = 325,032,415.60/20,462.74
  6. Step 6: Final answer
    x = 15,884.11

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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.