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Finding the Fourth Proportional to 21,128.70, 31,693.02 and 6,337.59

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Solution

The fourth proportional to 21,128.70, 31,693.02 and 6,337.59 is: 9,506.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.70 : 31,693.02 = 6,337.59 : x
  2. Step 2: Convert to fraction form
    21,128.70/31,693.02 = 6,337.59/x
  3. Step 3: Cross multiply
    21,128.70x = 31,693.02 × 6,337.59
  4. Step 4: Simplify right side
    21,128.70x = 200,857,437.93
  5. Step 5: Solve for x
    x = 200,857,437.93/21,128.70
  6. Step 6: Final answer
    x = 9,506.38

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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.