Home / 7,479.42-10,320.99-4,122.12

Finding the Fourth Proportional to 7,479.42, 10,320.99 and 4,122.12

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Solution

The fourth proportional to 7,479.42, 10,320.99 and 4,122.12 is: 5,688.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.42 : 10,320.99 = 4,122.12 : x
  2. Step 2: Convert to fraction form
    7,479.42/10,320.99 = 4,122.12/x
  3. Step 3: Cross multiply
    7,479.42x = 10,320.99 × 4,122.12
  4. Step 4: Simplify right side
    7,479.42x = 42,544,359.30
  5. Step 5: Solve for x
    x = 42,544,359.30/7,479.42
  6. Step 6: Final answer
    x = 5,688.19

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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.