Home / 21,306.72-31,960.18-6,515.58

Finding the Fourth Proportional to 21,306.72, 31,960.18 and 6,515.58

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Solution

The fourth proportional to 21,306.72, 31,960.18 and 6,515.58 is: 9,773.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.72 : 31,960.18 = 6,515.58 : x
  2. Step 2: Convert to fraction form
    21,306.72/31,960.18 = 6,515.58/x
  3. Step 3: Cross multiply
    21,306.72x = 31,960.18 × 6,515.58
  4. Step 4: Simplify right side
    21,306.72x = 208,239,109.60
  5. Step 5: Solve for x
    x = 208,239,109.60/21,306.72
  6. Step 6: Final answer
    x = 9,773.40

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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.