Home / 7,478.24-10,320.23-4,121.30

Finding the Fourth Proportional to 7,478.24, 10,320.23 and 4,121.30

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Solution

The fourth proportional to 7,478.24, 10,320.23 and 4,121.30 is: 5,687.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.24 : 10,320.23 = 4,121.30 : x
  2. Step 2: Convert to fraction form
    7,478.24/10,320.23 = 4,121.30/x
  3. Step 3: Cross multiply
    7,478.24x = 10,320.23 × 4,121.30
  4. Step 4: Simplify right side
    7,478.24x = 42,532,769.09
  5. Step 5: Solve for x
    x = 42,532,769.09/7,478.24
  6. Step 6: Final answer
    x = 5,687.54

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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.