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Finding the Fourth Proportional to 6,715.20, 10,070.40 and 3,019.20

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Solution

The fourth proportional to 6,715.20, 10,070.40 and 3,019.20 is: 4,527.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,715.20 : 10,070.40 = 3,019.20 : x
  2. Step 2: Convert to fraction form
    6,715.20/10,070.40 = 3,019.20/x
  3. Step 3: Cross multiply
    6,715.20x = 10,070.40 × 3,019.20
  4. Step 4: Simplify right side
    6,715.20x = 30,404,551.68
  5. Step 5: Solve for x
    x = 30,404,551.68/6,715.20
  6. Step 6: Final answer
    x = 4,527.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.