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Finding the Fourth Proportional to 21,043.73, 31,557.53 and 7,001.06

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Solution

The fourth proportional to 21,043.73, 31,557.53 and 7,001.06 is: 10,498.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.73 : 31,557.53 = 7,001.06 : x
  2. Step 2: Convert to fraction form
    21,043.73/31,557.53 = 7,001.06/x
  3. Step 3: Cross multiply
    21,043.73x = 31,557.53 × 7,001.06
  4. Step 4: Simplify right side
    21,043.73x = 220,936,020.70
  5. Step 5: Solve for x
    x = 220,936,020.70/21,043.73
  6. Step 6: Final answer
    x = 10,498.90

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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.