Home / 28,028.19-38,678.92-15,281.36

Finding the Fourth Proportional to 28,028.19, 38,678.92 and 15,281.36

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Solution

The fourth proportional to 28,028.19, 38,678.92 and 15,281.36 is: 21,088.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.19 : 38,678.92 = 15,281.36 : x
  2. Step 2: Convert to fraction form
    28,028.19/38,678.92 = 15,281.36/x
  3. Step 3: Cross multiply
    28,028.19x = 38,678.92 × 15,281.36
  4. Step 4: Simplify right side
    28,028.19x = 591,066,414.38
  5. Step 5: Solve for x
    x = 591,066,414.38/28,028.19
  6. Step 6: Final answer
    x = 21,088.28

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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.