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Finding the Fourth Proportional to 55,999.70, 83,999.55 and 20,934.80

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Solution

The fourth proportional to 55,999.70, 83,999.55 and 20,934.80 is: 31,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,999.70 : 83,999.55 = 20,934.80 : x
  2. Step 2: Convert to fraction form
    55,999.70/83,999.55 = 20,934.80/x
  3. Step 3: Cross multiply
    55,999.70x = 83,999.55 × 20,934.80
  4. Step 4: Simplify right side
    55,999.70x = 1,758,513,779.34
  5. Step 5: Solve for x
    x = 1,758,513,779.34/55,999.70
  6. Step 6: Final answer
    x = 31,402.20

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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.