Home / 15,281.25-21,087.79-8,567.43

Finding the Fourth Proportional to 15,281.25, 21,087.79 and 8,567.43

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Solution

The fourth proportional to 15,281.25, 21,087.79 and 8,567.43 is: 11,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,281.25 : 21,087.79 = 8,567.43 : x
  2. Step 2: Convert to fraction form
    15,281.25/21,087.79 = 8,567.43/x
  3. Step 3: Cross multiply
    15,281.25x = 21,087.79 × 8,567.43
  4. Step 4: Simplify right side
    15,281.25x = 180,668,164.68
  5. Step 5: Solve for x
    x = 180,668,164.68/15,281.25
  6. Step 6: Final answer
    x = 11,822.87

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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.