Home / 28,292.28-39,045-15,716.92

Finding the Fourth Proportional to 28,292.28, 39,045 and 15,716.92

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Solution

The fourth proportional to 28,292.28, 39,045 and 15,716.92 is: 21,690.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,292.28 : 39,045 = 15,716.92 : x
  2. Step 2: Convert to fraction form
    28,292.28/39,045 = 15,716.92/x
  3. Step 3: Cross multiply
    28,292.28x = 39,045 × 15,716.92
  4. Step 4: Simplify right side
    28,292.28x = 613,667,141.40
  5. Step 5: Solve for x
    x = 613,667,141.40/28,292.28
  6. Step 6: Final answer
    x = 21,690.27

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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.