Home / 28,131.07-38,819.31-15,381.72

Finding the Fourth Proportional to 28,131.07, 38,819.31 and 15,381.72

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Solution

The fourth proportional to 28,131.07, 38,819.31 and 15,381.72 is: 21,225.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.07 : 38,819.31 = 15,381.72 : x
  2. Step 2: Convert to fraction form
    28,131.07/38,819.31 = 15,381.72/x
  3. Step 3: Cross multiply
    28,131.07x = 38,819.31 × 15,381.72
  4. Step 4: Simplify right side
    28,131.07x = 597,107,851.77
  5. Step 5: Solve for x
    x = 597,107,851.77/28,131.07
  6. Step 6: Final answer
    x = 21,225.92

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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.