Home / 15,387.35-21,223.98-9,421.97

Finding the Fourth Proportional to 15,387.35, 21,223.98 and 9,421.97

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Solution

The fourth proportional to 15,387.35, 21,223.98 and 9,421.97 is: 12,995.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.35 : 21,223.98 = 9,421.97 : x
  2. Step 2: Convert to fraction form
    15,387.35/21,223.98 = 9,421.97/x
  3. Step 3: Cross multiply
    15,387.35x = 21,223.98 × 9,421.97
  4. Step 4: Simplify right side
    15,387.35x = 199,971,702.84
  5. Step 5: Solve for x
    x = 199,971,702.84/15,387.35
  6. Step 6: Final answer
    x = 12,995.85

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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.