Home / 28,428.26-39,232.20-15,853

Finding the Fourth Proportional to 28,428.26, 39,232.20 and 15,853

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Solution

The fourth proportional to 28,428.26, 39,232.20 and 15,853 is: 21,877.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.26 : 39,232.20 = 15,853 : x
  2. Step 2: Convert to fraction form
    28,428.26/39,232.20 = 15,853/x
  3. Step 3: Cross multiply
    28,428.26x = 39,232.20 × 15,853
  4. Step 4: Simplify right side
    28,428.26x = 621,948,066.60
  5. Step 5: Solve for x
    x = 621,948,066.60/28,428.26
  6. Step 6: Final answer
    x = 21,877.81

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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.