Home / 7,329.76-10,115.20-3,972.64

Finding the Fourth Proportional to 7,329.76, 10,115.20 and 3,972.64

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Solution

The fourth proportional to 7,329.76, 10,115.20 and 3,972.64 is: 5,482.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,329.76 : 10,115.20 = 3,972.64 : x
  2. Step 2: Convert to fraction form
    7,329.76/10,115.20 = 3,972.64/x
  3. Step 3: Cross multiply
    7,329.76x = 10,115.20 × 3,972.64
  4. Step 4: Simplify right side
    7,329.76x = 40,184,048.13
  5. Step 5: Solve for x
    x = 40,184,048.13/7,329.76
  6. Step 6: Final answer
    x = 5,482.31

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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.