Home / 15,853.40-21,877.32-8,780.12

Finding the Fourth Proportional to 15,853.40, 21,877.32 and 8,780.12

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Solution

The fourth proportional to 15,853.40, 21,877.32 and 8,780.12 is: 12,116.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.40 : 21,877.32 = 8,780.12 : x
  2. Step 2: Convert to fraction form
    15,853.40/21,877.32 = 8,780.12/x
  3. Step 3: Cross multiply
    15,853.40x = 21,877.32 × 8,780.12
  4. Step 4: Simplify right side
    15,853.40x = 192,085,494.88
  5. Step 5: Solve for x
    x = 192,085,494.88/15,853.40
  6. Step 6: Final answer
    x = 12,116.36

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Double scale
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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.