Home / 38,689.47-58,050.60-21,138.81

Finding the Fourth Proportional to 38,689.47, 58,050.60 and 21,138.81

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Solution

The fourth proportional to 38,689.47, 58,050.60 and 21,138.81 is: 31,717.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,689.47 : 58,050.60 = 21,138.81 : x
  2. Step 2: Convert to fraction form
    38,689.47/58,050.60 = 21,138.81/x
  3. Step 3: Cross multiply
    38,689.47x = 58,050.60 × 21,138.81
  4. Step 4: Simplify right side
    38,689.47x = 1,227,120,603.79
  5. Step 5: Solve for x
    x = 1,227,120,603.79/38,689.47
  6. Step 6: Final answer
    x = 31,717.17

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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.