Home / 28,269.07-39,016.35-21,134.79

Finding the Fourth Proportional to 28,269.07, 39,016.35 and 21,134.79

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Solution

The fourth proportional to 28,269.07, 39,016.35 and 21,134.79 is: 29,169.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269.07 : 39,016.35 = 21,134.79 : x
  2. Step 2: Convert to fraction form
    28,269.07/39,016.35 = 21,134.79/x
  3. Step 3: Cross multiply
    28,269.07x = 39,016.35 × 21,134.79
  4. Step 4: Simplify right side
    28,269.07x = 824,602,363.82
  5. Step 5: Solve for x
    x = 824,602,363.82/28,269.07
  6. Step 6: Final answer
    x = 29,169.78

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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.