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Finding the Fourth Proportional to 10,425.79, 15,627.75 and 7,648.30

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Solution

The fourth proportional to 10,425.79, 15,627.75 and 7,648.30 is: 11,464.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,425.79 : 15,627.75 = 7,648.30 : x
  2. Step 2: Convert to fraction form
    10,425.79/15,627.75 = 7,648.30/x
  3. Step 3: Cross multiply
    10,425.79x = 15,627.75 × 7,648.30
  4. Step 4: Simplify right side
    10,425.79x = 119,525,720.33
  5. Step 5: Solve for x
    x = 119,525,720.33/10,425.79
  6. Step 6: Final answer
    x = 11,464.43

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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.