Home / 28,005.50-42,008.22-19,213.76

Finding the Fourth Proportional to 28,005.50, 42,008.22 and 19,213.76

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Solution

The fourth proportional to 28,005.50, 42,008.22 and 19,213.76 is: 28,820.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.50 : 42,008.22 = 19,213.76 : x
  2. Step 2: Convert to fraction form
    28,005.50/42,008.22 = 19,213.76/x
  3. Step 3: Cross multiply
    28,005.50x = 42,008.22 × 19,213.76
  4. Step 4: Simplify right side
    28,005.50x = 807,135,857.11
  5. Step 5: Solve for x
    x = 807,135,857.11/28,005.50
  6. Step 6: Final answer
    x = 28,820.62

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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.