Home / 28,920.96-39,946.32-20,950.56

Finding the Fourth Proportional to 28,920.96, 39,946.32 and 20,950.56

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Solution

The fourth proportional to 28,920.96, 39,946.32 and 20,950.56 is: 28,937.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.96 : 39,946.32 = 20,950.56 : x
  2. Step 2: Convert to fraction form
    28,920.96/39,946.32 = 20,950.56/x
  3. Step 3: Cross multiply
    28,920.96x = 39,946.32 × 20,950.56
  4. Step 4: Simplify right side
    28,920.96x = 836,897,773.94
  5. Step 5: Solve for x
    x = 836,897,773.94/28,920.96
  6. Step 6: Final answer
    x = 28,937.41

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Double scale
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Similar ratio
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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.