Home / 7,972.12-11,003.36-5,172.76

Finding the Fourth Proportional to 7,972.12, 11,003.36 and 5,172.76

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Solution

The fourth proportional to 7,972.12, 11,003.36 and 5,172.76 is: 7,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.12 : 11,003.36 = 5,172.76 : x
  2. Step 2: Convert to fraction form
    7,972.12/11,003.36 = 5,172.76/x
  3. Step 3: Cross multiply
    7,972.12x = 11,003.36 × 5,172.76
  4. Step 4: Simplify right side
    7,972.12x = 56,917,740.47
  5. Step 5: Solve for x
    x = 56,917,740.47/7,972.12
  6. Step 6: Final answer
    x = 7,139.60

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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.