Home / 20,758.50-28,659.69-13,319.46

Finding the Fourth Proportional to 20,758.50, 28,659.69 and 13,319.46

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Solution

The fourth proportional to 20,758.50, 28,659.69 and 13,319.46 is: 18,389.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.50 : 28,659.69 = 13,319.46 : x
  2. Step 2: Convert to fraction form
    20,758.50/28,659.69 = 13,319.46/x
  3. Step 3: Cross multiply
    20,758.50x = 28,659.69 × 13,319.46
  4. Step 4: Simplify right side
    20,758.50x = 381,731,594.57
  5. Step 5: Solve for x
    x = 381,731,594.57/20,758.50
  6. Step 6: Final answer
    x = 18,389.17

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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.