Home / 8,720.39-11,981.61-6,948.92

Finding the Fourth Proportional to 8,720.39, 11,981.61 and 6,948.92

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Solution

The fourth proportional to 8,720.39, 11,981.61 and 6,948.92 is: 9,547.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.39 : 11,981.61 = 6,948.92 : x
  2. Step 2: Convert to fraction form
    8,720.39/11,981.61 = 6,948.92/x
  3. Step 3: Cross multiply
    8,720.39x = 11,981.61 × 6,948.92
  4. Step 4: Simplify right side
    8,720.39x = 83,259,249.36
  5. Step 5: Solve for x
    x = 83,259,249.36/8,720.39
  6. Step 6: Final answer
    x = 9,547.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.