Home / 12,117.48-16,721.68-6,812.79

Finding the Fourth Proportional to 12,117.48, 16,721.68 and 6,812.79

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Solution

The fourth proportional to 12,117.48, 16,721.68 and 6,812.79 is: 9,401.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.48 : 16,721.68 = 6,812.79 : x
  2. Step 2: Convert to fraction form
    12,117.48/16,721.68 = 6,812.79/x
  3. Step 3: Cross multiply
    12,117.48x = 16,721.68 × 6,812.79
  4. Step 4: Simplify right side
    12,117.48x = 113,921,294.29
  5. Step 5: Solve for x
    x = 113,921,294.29/12,117.48
  6. Step 6: Final answer
    x = 9,401.40

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Half scale
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Double scale
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Similar ratio
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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.