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Finding the Fourth Proportional to 9,828.90, 13,560.91 and 8,881.65

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Solution

The fourth proportional to 9,828.90, 13,560.91 and 8,881.65 is: 12,253.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,828.90 : 13,560.91 = 8,881.65 : x
  2. Step 2: Convert to fraction form
    9,828.90/13,560.91 = 8,881.65/x
  3. Step 3: Cross multiply
    9,828.90x = 13,560.91 × 8,881.65
  4. Step 4: Simplify right side
    9,828.90x = 120,443,188.50
  5. Step 5: Solve for x
    x = 120,443,188.50/9,828.90
  6. Step 6: Final answer
    x = 12,253.99

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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.