Home / 28,246.10-38,979.63-15,670.85

Finding the Fourth Proportional to 28,246.10, 38,979.63 and 15,670.85

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Solution

The fourth proportional to 28,246.10, 38,979.63 and 15,670.85 is: 21,625.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.10 : 38,979.63 = 15,670.85 : x
  2. Step 2: Convert to fraction form
    28,246.10/38,979.63 = 15,670.85/x
  3. Step 3: Cross multiply
    28,246.10x = 38,979.63 × 15,670.85
  4. Step 4: Simplify right side
    28,246.10x = 610,843,739.89
  5. Step 5: Solve for x
    x = 610,843,739.89/28,246.10
  6. Step 6: Final answer
    x = 21,625.78

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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.