Home / 7,478.16-10,320.31-4,120.97

Finding the Fourth Proportional to 7,478.16, 10,320.31 and 4,120.97

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Solution

The fourth proportional to 7,478.16, 10,320.31 and 4,120.97 is: 5,687.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.16 : 10,320.31 = 4,120.97 : x
  2. Step 2: Convert to fraction form
    7,478.16/10,320.31 = 4,120.97/x
  3. Step 3: Cross multiply
    7,478.16x = 10,320.31 × 4,120.97
  4. Step 4: Simplify right side
    7,478.16x = 42,529,626.00
  5. Step 5: Solve for x
    x = 42,529,626.00/7,478.16
  6. Step 6: Final answer
    x = 5,687.18

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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.