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Finding the Fourth Proportional to 8,810.79, 12,148.70 and 5,979.99

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Solution

The fourth proportional to 8,810.79, 12,148.70 and 5,979.99 is: 8,245.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,810.79 : 12,148.70 = 5,979.99 : x
  2. Step 2: Convert to fraction form
    8,810.79/12,148.70 = 5,979.99/x
  3. Step 3: Cross multiply
    8,810.79x = 12,148.70 × 5,979.99
  4. Step 4: Simplify right side
    8,810.79x = 72,649,134.69
  5. Step 5: Solve for x
    x = 72,649,134.69/8,810.79
  6. Step 6: Final answer
    x = 8,245.47

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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.