Home / 28,428.67-39,231.74-15,682.18

Finding the Fourth Proportional to 28,428.67, 39,231.74 and 15,682.18

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Solution

The fourth proportional to 28,428.67, 39,231.74 and 15,682.18 is: 21,641.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.67 : 39,231.74 = 15,682.18 : x
  2. Step 2: Convert to fraction form
    28,428.67/39,231.74 = 15,682.18/x
  3. Step 3: Cross multiply
    28,428.67x = 39,231.74 × 15,682.18
  4. Step 4: Simplify right side
    28,428.67x = 615,239,333.42
  5. Step 5: Solve for x
    x = 615,239,333.42/28,428.67
  6. Step 6: Final answer
    x = 21,641.51

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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.