Home / 20,738.72-28,635.12-13,675.04

Finding the Fourth Proportional to 20,738.72, 28,635.12 and 13,675.04

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Solution

The fourth proportional to 20,738.72, 28,635.12 and 13,675.04 is: 18,881.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.72 : 28,635.12 = 13,675.04 : x
  2. Step 2: Convert to fraction form
    20,738.72/28,635.12 = 13,675.04/x
  3. Step 3: Cross multiply
    20,738.72x = 28,635.12 × 13,675.04
  4. Step 4: Simplify right side
    20,738.72x = 391,586,411.40
  5. Step 5: Solve for x
    x = 391,586,411.40/20,738.72
  6. Step 6: Final answer
    x = 18,881.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.