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Finding the Fourth Proportional to 6,648.90, 9,987.03 and 6,427.50

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Solution

The fourth proportional to 6,648.90, 9,987.03 and 6,427.50 is: 9,654.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,648.90 : 9,987.03 = 6,427.50 : x
  2. Step 2: Convert to fraction form
    6,648.90/9,987.03 = 6,427.50/x
  3. Step 3: Cross multiply
    6,648.90x = 9,987.03 × 6,427.50
  4. Step 4: Simplify right side
    6,648.90x = 64,191,635.33
  5. Step 5: Solve for x
    x = 64,191,635.33/6,648.90
  6. Step 6: Final answer
    x = 9,654.47

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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.