Home / 28,639.08-39,521.19-15,892.21

Finding the Fourth Proportional to 28,639.08, 39,521.19 and 15,892.21

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Solution

The fourth proportional to 28,639.08, 39,521.19 and 15,892.21 is: 21,930.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.08 : 39,521.19 = 15,892.21 : x
  2. Step 2: Convert to fraction form
    28,639.08/39,521.19 = 15,892.21/x
  3. Step 3: Cross multiply
    28,639.08x = 39,521.19 × 15,892.21
  4. Step 4: Simplify right side
    28,639.08x = 628,079,159.93
  5. Step 5: Solve for x
    x = 628,079,159.93/28,639.08
  6. Step 6: Final answer
    x = 21,930.84

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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.