Home / 28,719.28-39,633.53-17,390.89

Finding the Fourth Proportional to 28,719.28, 39,633.53 and 17,390.89

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Solution

The fourth proportional to 28,719.28, 39,633.53 and 17,390.89 is: 23,999.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.28 : 39,633.53 = 17,390.89 : x
  2. Step 2: Convert to fraction form
    28,719.28/39,633.53 = 17,390.89/x
  3. Step 3: Cross multiply
    28,719.28x = 39,633.53 × 17,390.89
  4. Step 4: Simplify right side
    28,719.28x = 689,262,360.54
  5. Step 5: Solve for x
    x = 689,262,360.54/28,719.28
  6. Step 6: Final answer
    x = 23,999.99

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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.