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Finding the Fourth Proportional to 26,813.60, 40,220.40 and 16,920.80

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Solution

The fourth proportional to 26,813.60, 40,220.40 and 16,920.80 is: 25,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,813.60 : 40,220.40 = 16,920.80 : x
  2. Step 2: Convert to fraction form
    26,813.60/40,220.40 = 16,920.80/x
  3. Step 3: Cross multiply
    26,813.60x = 40,220.40 × 16,920.80
  4. Step 4: Simplify right side
    26,813.60x = 680,561,344.32
  5. Step 5: Solve for x
    x = 680,561,344.32/26,813.60
  6. Step 6: Final answer
    x = 25,381.20

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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.