Home / 28,214.96-38,936.52-15,639.68

Finding the Fourth Proportional to 28,214.96, 38,936.52 and 15,639.68

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Solution

The fourth proportional to 28,214.96, 38,936.52 and 15,639.68 is: 21,582.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,214.96 : 38,936.52 = 15,639.68 : x
  2. Step 2: Convert to fraction form
    28,214.96/38,936.52 = 15,639.68/x
  3. Step 3: Cross multiply
    28,214.96x = 38,936.52 × 15,639.68
  4. Step 4: Simplify right side
    28,214.96x = 608,954,713.11
  5. Step 5: Solve for x
    x = 608,954,713.11/28,214.96
  6. Step 6: Final answer
    x = 21,582.69

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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.