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Finding the Fourth Proportional to 9,930.40, 14,895.60 and 9,800.80

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Solution

The fourth proportional to 9,930.40, 14,895.60 and 9,800.80 is: 14,701.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,930.40 : 14,895.60 = 9,800.80 : x
  2. Step 2: Convert to fraction form
    9,930.40/14,895.60 = 9,800.80/x
  3. Step 3: Cross multiply
    9,930.40x = 14,895.60 × 9,800.80
  4. Step 4: Simplify right side
    9,930.40x = 145,988,796.48
  5. Step 5: Solve for x
    x = 145,988,796.48/9,930.40
  6. Step 6: Final answer
    x = 14,701.20

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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.