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Finding the Fourth Proportional to 36,421.20, 54,649.08 and 28,645.20

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Solution

The fourth proportional to 36,421.20, 54,649.08 and 28,645.20 is: 42,981.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,421.20 : 54,649.08 = 28,645.20 : x
  2. Step 2: Convert to fraction form
    36,421.20/54,649.08 = 28,645.20/x
  3. Step 3: Cross multiply
    36,421.20x = 54,649.08 × 28,645.20
  4. Step 4: Simplify right side
    36,421.20x = 1,565,433,826.42
  5. Step 5: Solve for x
    x = 1,565,433,826.42/36,421.20
  6. Step 6: Final answer
    x = 42,981.39

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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.