Home / 21,945.60-32,918.40-20,131.20

Finding the Fourth Proportional to 21,945.60, 32,918.40 and 20,131.20

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Solution

The fourth proportional to 21,945.60, 32,918.40 and 20,131.20 is: 30,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.60 : 32,918.40 = 20,131.20 : x
  2. Step 2: Convert to fraction form
    21,945.60/32,918.40 = 20,131.20/x
  3. Step 3: Cross multiply
    21,945.60x = 32,918.40 × 20,131.20
  4. Step 4: Simplify right side
    21,945.60x = 662,686,894.08
  5. Step 5: Solve for x
    x = 662,686,894.08/21,945.60
  6. Step 6: Final answer
    x = 30,196.80

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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.