Home / 28,381.44-39,166.40-15,805.92

Finding the Fourth Proportional to 28,381.44, 39,166.40 and 15,805.92

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Solution

The fourth proportional to 28,381.44, 39,166.40 and 15,805.92 is: 21,812.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.44 : 39,166.40 = 15,805.92 : x
  2. Step 2: Convert to fraction form
    28,381.44/39,166.40 = 15,805.92/x
  3. Step 3: Cross multiply
    28,381.44x = 39,166.40 × 15,805.92
  4. Step 4: Simplify right side
    28,381.44x = 619,060,985.09
  5. Step 5: Solve for x
    x = 619,060,985.09/28,381.44
  6. Step 6: Final answer
    x = 21,812.18

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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.