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Finding the Fourth Proportional to 6,881.20, 10,300.20 and 5,412.40

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Solution

The fourth proportional to 6,881.20, 10,300.20 and 5,412.40 is: 8,101.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,881.20 : 10,300.20 = 5,412.40 : x
  2. Step 2: Convert to fraction form
    6,881.20/10,300.20 = 5,412.40/x
  3. Step 3: Cross multiply
    6,881.20x = 10,300.20 × 5,412.40
  4. Step 4: Simplify right side
    6,881.20x = 55,748,802.48
  5. Step 5: Solve for x
    x = 55,748,802.48/6,881.20
  6. Step 6: Final answer
    x = 8,101.61

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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.