Home / 28,413-39,211.16-15,837.75

Finding the Fourth Proportional to 28,413, 39,211.16 and 15,837.75

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Solution

The fourth proportional to 28,413, 39,211.16 and 15,837.75 is: 21,856.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413 : 39,211.16 = 15,837.75 : x
  2. Step 2: Convert to fraction form
    28,413/39,211.16 = 15,837.75/x
  3. Step 3: Cross multiply
    28,413x = 39,211.16 × 15,837.75
  4. Step 4: Simplify right side
    28,413x = 621,016,470.10
  5. Step 5: Solve for x
    x = 621,016,470.10/28,413
  6. Step 6: Final answer
    x = 21,856.77

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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.