Home / 21,239.40-29,306-12,283.62

Finding the Fourth Proportional to 21,239.40, 29,306 and 12,283.62

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Solution

The fourth proportional to 21,239.40, 29,306 and 12,283.62 is: 16,948.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.40 : 29,306 = 12,283.62 : x
  2. Step 2: Convert to fraction form
    21,239.40/29,306 = 12,283.62/x
  3. Step 3: Cross multiply
    21,239.40x = 29,306 × 12,283.62
  4. Step 4: Simplify right side
    21,239.40x = 359,983,767.72
  5. Step 5: Solve for x
    x = 359,983,767.72/21,239.40
  6. Step 6: Final answer
    x = 16,948.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.