Home / 10,972.12-15,132-7,620.52

Finding the Fourth Proportional to 10,972.12, 15,132 and 7,620.52

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Solution

The fourth proportional to 10,972.12, 15,132 and 7,620.52 is: 10,509.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,972.12 : 15,132 = 7,620.52 : x
  2. Step 2: Convert to fraction form
    10,972.12/15,132 = 7,620.52/x
  3. Step 3: Cross multiply
    10,972.12x = 15,132 × 7,620.52
  4. Step 4: Simplify right side
    10,972.12x = 115,313,708.64
  5. Step 5: Solve for x
    x = 115,313,708.64/10,972.12
  6. Step 6: Final answer
    x = 10,509.70

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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.