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Finding the Fourth Proportional to 36,886.20, 55,256.40 and 20,216.40

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Solution

The fourth proportional to 36,886.20, 55,256.40 and 20,216.40 is: 30,284.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,886.20 : 55,256.40 = 20,216.40 : x
  2. Step 2: Convert to fraction form
    36,886.20/55,256.40 = 20,216.40/x
  3. Step 3: Cross multiply
    36,886.20x = 55,256.40 × 20,216.40
  4. Step 4: Simplify right side
    36,886.20x = 1,117,085,484.96
  5. Step 5: Solve for x
    x = 1,117,085,484.96/36,886.20
  6. Step 6: Final answer
    x = 30,284.65

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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.