Home / 28,066.28-38,745.81-21,678.57

Finding the Fourth Proportional to 28,066.28, 38,745.81 and 21,678.57

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Solution

The fourth proportional to 28,066.28, 38,745.81 and 21,678.57 is: 29,927.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,066.28 : 38,745.81 = 21,678.57 : x
  2. Step 2: Convert to fraction form
    28,066.28/38,745.81 = 21,678.57/x
  3. Step 3: Cross multiply
    28,066.28x = 38,745.81 × 21,678.57
  4. Step 4: Simplify right side
    28,066.28x = 839,953,754.29
  5. Step 5: Solve for x
    x = 839,953,754.29/28,066.28
  6. Step 6: Final answer
    x = 29,927.51

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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.