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Finding the Fourth Proportional to 36,888.20, 55,259.40 and 20,218.40

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Solution

The fourth proportional to 36,888.20, 55,259.40 and 20,218.40 is: 30,287.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,888.20 : 55,259.40 = 20,218.40 : x
  2. Step 2: Convert to fraction form
    36,888.20/55,259.40 = 20,218.40/x
  3. Step 3: Cross multiply
    36,888.20x = 55,259.40 × 20,218.40
  4. Step 4: Simplify right side
    36,888.20x = 1,117,256,652.96
  5. Step 5: Solve for x
    x = 1,117,256,652.96/36,888.20
  6. Step 6: Final answer
    x = 30,287.64

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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.