Home / 38,690.22-58,051.76-21,139.55

Finding the Fourth Proportional to 38,690.22, 58,051.76 and 21,139.55

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Solution

The fourth proportional to 38,690.22, 58,051.76 and 21,139.55 is: 31,718.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.22 : 58,051.76 = 21,139.55 : x
  2. Step 2: Convert to fraction form
    38,690.22/58,051.76 = 21,139.55/x
  3. Step 3: Cross multiply
    38,690.22x = 58,051.76 × 21,139.55
  4. Step 4: Simplify right side
    38,690.22x = 1,227,187,904.85
  5. Step 5: Solve for x
    x = 1,227,187,904.85/38,690.22
  6. Step 6: Final answer
    x = 31,718.29

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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.