Home / 28,691.35-39,582.97-21,155.52

Finding the Fourth Proportional to 28,691.35, 39,582.97 and 21,155.52

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Solution

The fourth proportional to 28,691.35, 39,582.97 and 21,155.52 is: 29,186.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.35 : 39,582.97 = 21,155.52 : x
  2. Step 2: Convert to fraction form
    28,691.35/39,582.97 = 21,155.52/x
  3. Step 3: Cross multiply
    28,691.35x = 39,582.97 × 21,155.52
  4. Step 4: Simplify right side
    28,691.35x = 837,398,313.49
  5. Step 5: Solve for x
    x = 837,398,313.49/28,691.35
  6. Step 6: Final answer
    x = 29,186.44

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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.