Home / 15,279.88-21,087.12-8,567.70

Finding the Fourth Proportional to 15,279.88, 21,087.12 and 8,567.70

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Solution

The fourth proportional to 15,279.88, 21,087.12 and 8,567.70 is: 11,823.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.88 : 21,087.12 = 8,567.70 : x
  2. Step 2: Convert to fraction form
    15,279.88/21,087.12 = 8,567.70/x
  3. Step 3: Cross multiply
    15,279.88x = 21,087.12 × 8,567.70
  4. Step 4: Simplify right side
    15,279.88x = 180,668,118.02
  5. Step 5: Solve for x
    x = 180,668,118.02/15,279.88
  6. Step 6: Final answer
    x = 11,823.92

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1.5x scale

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.