Home / 28,381.26-39,117.15-21,295.38

Finding the Fourth Proportional to 28,381.26, 39,117.15 and 21,295.38

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Solution

The fourth proportional to 28,381.26, 39,117.15 and 21,295.38 is: 29,350.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.26 : 39,117.15 = 21,295.38 : x
  2. Step 2: Convert to fraction form
    28,381.26/39,117.15 = 21,295.38/x
  3. Step 3: Cross multiply
    28,381.26x = 39,117.15 × 21,295.38
  4. Step 4: Simplify right side
    28,381.26x = 833,014,573.77
  5. Step 5: Solve for x
    x = 833,014,573.77/28,381.26
  6. Step 6: Final answer
    x = 29,350.87

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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.