Home / 5,415.20-7,472.96-2,931.20

Finding the Fourth Proportional to 5,415.20, 7,472.96 and 2,931.20

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Solution

The fourth proportional to 5,415.20, 7,472.96 and 2,931.20 is: 4,045.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.20 : 7,472.96 = 2,931.20 : x
  2. Step 2: Convert to fraction form
    5,415.20/7,472.96 = 2,931.20/x
  3. Step 3: Cross multiply
    5,415.20x = 7,472.96 × 2,931.20
  4. Step 4: Simplify right side
    5,415.20x = 21,904,688.33
  5. Step 5: Solve for x
    x = 21,904,688.33/5,415.20
  6. Step 6: Final answer
    x = 4,045.04

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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.