Home / 10,349.80-15,540.90-7,887.40

Finding the Fourth Proportional to 10,349.80, 15,540.90 and 7,887.40

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Solution

The fourth proportional to 10,349.80, 15,540.90 and 7,887.40 is: 11,843.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,349.80 : 15,540.90 = 7,887.40 : x
  2. Step 2: Convert to fraction form
    10,349.80/15,540.90 = 7,887.40/x
  3. Step 3: Cross multiply
    10,349.80x = 15,540.90 × 7,887.40
  4. Step 4: Simplify right side
    10,349.80x = 122,577,294.66
  5. Step 5: Solve for x
    x = 122,577,294.66/10,349.80
  6. Step 6: Final answer
    x = 11,843.45

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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.