Home / 28,381.26-39,165.75-15,806.10

Finding the Fourth Proportional to 28,381.26, 39,165.75 and 15,806.10

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Solution

The fourth proportional to 28,381.26, 39,165.75 and 15,806.10 is: 21,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.26 : 39,165.75 = 15,806.10 : x
  2. Step 2: Convert to fraction form
    28,381.26/39,165.75 = 15,806.10/x
  3. Step 3: Cross multiply
    28,381.26x = 39,165.75 × 15,806.10
  4. Step 4: Simplify right side
    28,381.26x = 619,057,761.08
  5. Step 5: Solve for x
    x = 619,057,761.08/28,381.26
  6. Step 6: Final answer
    x = 21,812.20

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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.