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Finding the Fourth Proportional to 26,649.80, 39,904.30 and 21,360.20

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Solution

The fourth proportional to 26,649.80, 39,904.30 and 21,360.20 is: 31,983.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,649.80 : 39,904.30 = 21,360.20 : x
  2. Step 2: Convert to fraction form
    26,649.80/39,904.30 = 21,360.20/x
  3. Step 3: Cross multiply
    26,649.80x = 39,904.30 × 21,360.20
  4. Step 4: Simplify right side
    26,649.80x = 852,363,828.86
  5. Step 5: Solve for x
    x = 852,363,828.86/26,649.80
  6. Step 6: Final answer
    x = 31,983.87

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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.