Home / 28,856.78-39,838.91-21,996.95

Finding the Fourth Proportional to 28,856.78, 39,838.91 and 21,996.95

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Solution

The fourth proportional to 28,856.78, 39,838.91 and 21,996.95 is: 30,368.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,856.78 : 39,838.91 = 21,996.95 : x
  2. Step 2: Convert to fraction form
    28,856.78/39,838.91 = 21,996.95/x
  3. Step 3: Cross multiply
    28,856.78x = 39,838.91 × 21,996.95
  4. Step 4: Simplify right side
    28,856.78x = 876,334,202.15
  5. Step 5: Solve for x
    x = 876,334,202.15/28,856.78
  6. Step 6: Final answer
    x = 30,368.40

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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.