Home / 21,045.36-31,561.17-7,001.61

Finding the Fourth Proportional to 21,045.36, 31,561.17 and 7,001.61

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Solution

The fourth proportional to 21,045.36, 31,561.17 and 7,001.61 is: 10,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.36 : 31,561.17 = 7,001.61 : x
  2. Step 2: Convert to fraction form
    21,045.36/31,561.17 = 7,001.61/x
  3. Step 3: Cross multiply
    21,045.36x = 31,561.17 × 7,001.61
  4. Step 4: Simplify right side
    21,045.36x = 220,979,003.48
  5. Step 5: Solve for x
    x = 220,979,003.48/21,045.36
  6. Step 6: Final answer
    x = 10,500.13

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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.