Home / 28,639.14-39,521.96-15,894.28

Finding the Fourth Proportional to 28,639.14, 39,521.96 and 15,894.28

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Solution

The fourth proportional to 28,639.14, 39,521.96 and 15,894.28 is: 21,934.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.14 : 39,521.96 = 15,894.28 : x
  2. Step 2: Convert to fraction form
    28,639.14/39,521.96 = 15,894.28/x
  3. Step 3: Cross multiply
    28,639.14x = 39,521.96 × 15,894.28
  4. Step 4: Simplify right side
    28,639.14x = 628,173,098.39
  5. Step 5: Solve for x
    x = 628,173,098.39/28,639.14
  6. Step 6: Final answer
    x = 21,934.08

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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.