Home / 7,478.47-10,320.74-4,121.28

Finding the Fourth Proportional to 7,478.47, 10,320.74 and 4,121.28

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Solution

The fourth proportional to 7,478.47, 10,320.74 and 4,121.28 is: 5,687.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.47 : 10,320.74 = 4,121.28 : x
  2. Step 2: Convert to fraction form
    7,478.47/10,320.74 = 4,121.28/x
  3. Step 3: Cross multiply
    7,478.47x = 10,320.74 × 4,121.28
  4. Step 4: Simplify right side
    7,478.47x = 42,534,659.35
  5. Step 5: Solve for x
    x = 42,534,659.35/7,478.47
  6. Step 6: Final answer
    x = 5,687.62

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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.