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Finding the Fourth Proportional to 9,281.40, 12,789.48 and 8,625.28

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Solution

The fourth proportional to 9,281.40, 12,789.48 and 8,625.28 is: 11,885.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,281.40 : 12,789.48 = 8,625.28 : x
  2. Step 2: Convert to fraction form
    9,281.40/12,789.48 = 8,625.28/x
  3. Step 3: Cross multiply
    9,281.40x = 12,789.48 × 8,625.28
  4. Step 4: Simplify right side
    9,281.40x = 110,312,846.05
  5. Step 5: Solve for x
    x = 110,312,846.05/9,281.40
  6. Step 6: Final answer
    x = 11,885.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.