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Finding the Fourth Proportional to 55,907.70, 83,861.55 and 20,842.80

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Solution

The fourth proportional to 55,907.70, 83,861.55 and 20,842.80 is: 31,264.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,907.70 : 83,861.55 = 20,842.80 : x
  2. Step 2: Convert to fraction form
    55,907.70/83,861.55 = 20,842.80/x
  3. Step 3: Cross multiply
    55,907.70x = 83,861.55 × 20,842.80
  4. Step 4: Simplify right side
    55,907.70x = 1,747,909,514.34
  5. Step 5: Solve for x
    x = 1,747,909,514.34/55,907.70
  6. Step 6: Final answer
    x = 31,264.20

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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.