Home / 7,479.15-10,321.81-4,122.57

Finding the Fourth Proportional to 7,479.15, 10,321.81 and 4,122.57

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Solution

The fourth proportional to 7,479.15, 10,321.81 and 4,122.57 is: 5,689.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.15 : 10,321.81 = 4,122.57 : x
  2. Step 2: Convert to fraction form
    7,479.15/10,321.81 = 4,122.57/x
  3. Step 3: Cross multiply
    7,479.15x = 10,321.81 × 4,122.57
  4. Step 4: Simplify right side
    7,479.15x = 42,552,384.25
  5. Step 5: Solve for x
    x = 42,552,384.25/7,479.15
  6. Step 6: Final answer
    x = 5,689.47

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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.