Home / 28,685.61-39,575.07-21,149.85

Finding the Fourth Proportional to 28,685.61, 39,575.07 and 21,149.85

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Solution

The fourth proportional to 28,685.61, 39,575.07 and 21,149.85 is: 29,178.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.61 : 39,575.07 = 21,149.85 : x
  2. Step 2: Convert to fraction form
    28,685.61/39,575.07 = 21,149.85/x
  3. Step 3: Cross multiply
    28,685.61x = 39,575.07 × 21,149.85
  4. Step 4: Simplify right side
    28,685.61x = 837,006,794.24
  5. Step 5: Solve for x
    x = 837,006,794.24/28,685.61
  6. Step 6: Final answer
    x = 29,178.63

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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.