Home / 28,381.08-39,165.90-15,805.83

Finding the Fourth Proportional to 28,381.08, 39,165.90 and 15,805.83

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Solution

The fourth proportional to 28,381.08, 39,165.90 and 15,805.83 is: 21,812.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.08 : 39,165.90 = 15,805.83 : x
  2. Step 2: Convert to fraction form
    28,381.08/39,165.90 = 15,805.83/x
  3. Step 3: Cross multiply
    28,381.08x = 39,165.90 × 15,805.83
  4. Step 4: Simplify right side
    28,381.08x = 619,049,644.80
  5. Step 5: Solve for x
    x = 619,049,644.80/28,381.08
  6. Step 6: Final answer
    x = 21,812.05

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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.