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Finding the Fourth Proportional to 5,152.20, 7,720.05 and 5,015.52

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Solution

The fourth proportional to 5,152.20, 7,720.05 and 5,015.52 is: 7,515.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,152.20 : 7,720.05 = 5,015.52 : x
  2. Step 2: Convert to fraction form
    5,152.20/7,720.05 = 5,015.52/x
  3. Step 3: Cross multiply
    5,152.20x = 7,720.05 × 5,015.52
  4. Step 4: Simplify right side
    5,152.20x = 38,720,065.18
  5. Step 5: Solve for x
    x = 38,720,065.18/5,152.20
  6. Step 6: Final answer
    x = 7,515.25

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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.