Home / 21,176.85-31,767.30-7,853.43

Finding the Fourth Proportional to 21,176.85, 31,767.30 and 7,853.43

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Solution

The fourth proportional to 21,176.85, 31,767.30 and 7,853.43 is: 11,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.85 : 31,767.30 = 7,853.43 : x
  2. Step 2: Convert to fraction form
    21,176.85/31,767.30 = 7,853.43/x
  3. Step 3: Cross multiply
    21,176.85x = 31,767.30 × 7,853.43
  4. Step 4: Simplify right side
    21,176.85x = 249,482,266.84
  5. Step 5: Solve for x
    x = 249,482,266.84/21,176.85
  6. Step 6: Final answer
    x = 11,780.90

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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.