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Finding the Fourth Proportional to 53,998.80, 80,959.77 and 20,690.70

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Solution

The fourth proportional to 53,998.80, 80,959.77 and 20,690.70 is: 31,021.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,998.80 : 80,959.77 = 20,690.70 : x
  2. Step 2: Convert to fraction form
    53,998.80/80,959.77 = 20,690.70/x
  3. Step 3: Cross multiply
    53,998.80x = 80,959.77 × 20,690.70
  4. Step 4: Simplify right side
    53,998.80x = 1,675,114,313.14
  5. Step 5: Solve for x
    x = 1,675,114,313.14/53,998.80
  6. Step 6: Final answer
    x = 31,021.32

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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.