Home / 11,166.91-15,407.07-7,981.18

Finding the Fourth Proportional to 11,166.91, 15,407.07 and 7,981.18

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Solution

The fourth proportional to 11,166.91, 15,407.07 and 7,981.18 is: 11,011.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,166.91 : 15,407.07 = 7,981.18 : x
  2. Step 2: Convert to fraction form
    11,166.91/15,407.07 = 7,981.18/x
  3. Step 3: Cross multiply
    11,166.91x = 15,407.07 × 7,981.18
  4. Step 4: Simplify right side
    11,166.91x = 122,966,521.91
  5. Step 5: Solve for x
    x = 122,966,521.91/11,166.91
  6. Step 6: Final answer
    x = 11,011.69

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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.