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Finding the Fourth Proportional to 6,988.80, 10,444.80 and 6,297.60

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Solution

The fourth proportional to 6,988.80, 10,444.80 and 6,297.60 is: 9,411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988.80 : 10,444.80 = 6,297.60 : x
  2. Step 2: Convert to fraction form
    6,988.80/10,444.80 = 6,297.60/x
  3. Step 3: Cross multiply
    6,988.80x = 10,444.80 × 6,297.60
  4. Step 4: Simplify right side
    6,988.80x = 65,777,172.48
  5. Step 5: Solve for x
    x = 65,777,172.48/6,988.80
  6. Step 6: Final answer
    x = 9,411.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.