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Finding the Fourth Proportional to 20,658.64, 28,510.07 and 11,709.03

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Solution

The fourth proportional to 20,658.64, 28,510.07 and 11,709.03 is: 16,159.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.64 : 28,510.07 = 11,709.03 : x
  2. Step 2: Convert to fraction form
    20,658.64/28,510.07 = 11,709.03/x
  3. Step 3: Cross multiply
    20,658.64x = 28,510.07 × 11,709.03
  4. Step 4: Simplify right side
    20,658.64x = 333,825,264.93
  5. Step 5: Solve for x
    x = 333,825,264.93/20,658.64
  6. Step 6: Final answer
    x = 16,159.11

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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.