Home / 13,101.14-18,085.66-7,721.88

Finding the Fourth Proportional to 13,101.14, 18,085.66 and 7,721.88

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Solution

The fourth proportional to 13,101.14, 18,085.66 and 7,721.88 is: 10,659.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.14 : 18,085.66 = 7,721.88 : x
  2. Step 2: Convert to fraction form
    13,101.14/18,085.66 = 7,721.88/x
  3. Step 3: Cross multiply
    13,101.14x = 18,085.66 × 7,721.88
  4. Step 4: Simplify right side
    13,101.14x = 139,655,205.81
  5. Step 5: Solve for x
    x = 139,655,205.81/13,101.14
  6. Step 6: Final answer
    x = 10,659.78

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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.