Home / 12,721.68-17,557.56-7,133.76

Finding the Fourth Proportional to 12,721.68, 17,557.56 and 7,133.76

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Solution

The fourth proportional to 12,721.68, 17,557.56 and 7,133.76 is: 9,845.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.68 : 17,557.56 = 7,133.76 : x
  2. Step 2: Convert to fraction form
    12,721.68/17,557.56 = 7,133.76/x
  3. Step 3: Cross multiply
    12,721.68x = 17,557.56 × 7,133.76
  4. Step 4: Simplify right side
    12,721.68x = 125,251,419.23
  5. Step 5: Solve for x
    x = 125,251,419.23/12,721.68
  6. Step 6: Final answer
    x = 9,845.51

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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.