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Finding the Fourth Proportional to 26,679.65, 40,031.08 and 12,649.50

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Solution

The fourth proportional to 26,679.65, 40,031.08 and 12,649.50 is: 18,979.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,679.65 : 40,031.08 = 12,649.50 : x
  2. Step 2: Convert to fraction form
    26,679.65/40,031.08 = 12,649.50/x
  3. Step 3: Cross multiply
    26,679.65x = 40,031.08 × 12,649.50
  4. Step 4: Simplify right side
    26,679.65x = 506,373,114.84
  5. Step 5: Solve for x
    x = 506,373,114.84/26,679.65
  6. Step 6: Final answer
    x = 18,979.75

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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.