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Finding the Fourth Proportional to 7,512.80, 11,256.40 and 6,207.20

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Solution

The fourth proportional to 7,512.80, 11,256.40 and 6,207.20 is: 9,300.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,512.80 : 11,256.40 = 6,207.20 : x
  2. Step 2: Convert to fraction form
    7,512.80/11,256.40 = 6,207.20/x
  3. Step 3: Cross multiply
    7,512.80x = 11,256.40 × 6,207.20
  4. Step 4: Simplify right side
    7,512.80x = 69,870,726.08
  5. Step 5: Solve for x
    x = 69,870,726.08/7,512.80
  6. Step 6: Final answer
    x = 9,300.22

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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.