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Finding the Fourth Proportional to 21,062.70, 31,593.75 and 6,271.70

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Solution

The fourth proportional to 21,062.70, 31,593.75 and 6,271.70 is: 9,407.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.70 : 31,593.75 = 6,271.70 : x
  2. Step 2: Convert to fraction form
    21,062.70/31,593.75 = 6,271.70/x
  3. Step 3: Cross multiply
    21,062.70x = 31,593.75 × 6,271.70
  4. Step 4: Simplify right side
    21,062.70x = 198,146,340.39
  5. Step 5: Solve for x
    x = 198,146,340.39/21,062.70
  6. Step 6: Final answer
    x = 9,407.45

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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.