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Finding the Fourth Proportional to 9,938.40, 14,909.40 and 4,995.60

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Solution

The fourth proportional to 9,938.40, 14,909.40 and 4,995.60 is: 7,494.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,938.40 : 14,909.40 = 4,995.60 : x
  2. Step 2: Convert to fraction form
    9,938.40/14,909.40 = 4,995.60/x
  3. Step 3: Cross multiply
    9,938.40x = 14,909.40 × 4,995.60
  4. Step 4: Simplify right side
    9,938.40x = 74,481,398.64
  5. Step 5: Solve for x
    x = 74,481,398.64/9,938.40
  6. Step 6: Final answer
    x = 7,494.30

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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.