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Finding the Fourth Proportional to 7,007.20, 10,510.80 and 4,415.20

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Solution

The fourth proportional to 7,007.20, 10,510.80 and 4,415.20 is: 6,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,007.20 : 10,510.80 = 4,415.20 : x
  2. Step 2: Convert to fraction form
    7,007.20/10,510.80 = 4,415.20/x
  3. Step 3: Cross multiply
    7,007.20x = 10,510.80 × 4,415.20
  4. Step 4: Simplify right side
    7,007.20x = 46,407,284.16
  5. Step 5: Solve for x
    x = 46,407,284.16/7,007.20
  6. Step 6: Final answer
    x = 6,622.80

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Similar ratio
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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.