Home / 21,031.06-31,480.98-15,490.66

Finding the Fourth Proportional to 21,031.06, 31,480.98 and 15,490.66

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Solution

The fourth proportional to 21,031.06, 31,480.98 and 15,490.66 is: 23,187.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.06 : 31,480.98 = 15,490.66 : x
  2. Step 2: Convert to fraction form
    21,031.06/31,480.98 = 15,490.66/x
  3. Step 3: Cross multiply
    21,031.06x = 31,480.98 × 15,490.66
  4. Step 4: Simplify right side
    21,031.06x = 487,661,157.65
  5. Step 5: Solve for x
    x = 487,661,157.65/21,031.06
  6. Step 6: Final answer
    x = 23,187.66

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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.