Home / 15,780.18-21,778.17-11,794.35

Finding the Fourth Proportional to 15,780.18, 21,778.17 and 11,794.35

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Solution

The fourth proportional to 15,780.18, 21,778.17 and 11,794.35 is: 16,277.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.18 : 21,778.17 = 11,794.35 : x
  2. Step 2: Convert to fraction form
    15,780.18/21,778.17 = 11,794.35/x
  3. Step 3: Cross multiply
    15,780.18x = 21,778.17 × 11,794.35
  4. Step 4: Simplify right side
    15,780.18x = 256,859,359.34
  5. Step 5: Solve for x
    x = 256,859,359.34/15,780.18
  6. Step 6: Final answer
    x = 16,277.34

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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.