Home / 18,961.57-28,419.29-13,416.52

Finding the Fourth Proportional to 18,961.57, 28,419.29 and 13,416.52

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Solution

The fourth proportional to 18,961.57, 28,419.29 and 13,416.52 is: 20,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.57 : 28,419.29 = 13,416.52 : x
  2. Step 2: Convert to fraction form
    18,961.57/28,419.29 = 13,416.52/x
  3. Step 3: Cross multiply
    18,961.57x = 28,419.29 × 13,416.52
  4. Step 4: Simplify right side
    18,961.57x = 381,287,763.49
  5. Step 5: Solve for x
    x = 381,287,763.49/18,961.57
  6. Step 6: Final answer
    x = 20,108.45

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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.