Home / 28,131.60-38,821.56-15,384.84

Finding the Fourth Proportional to 28,131.60, 38,821.56 and 15,384.84

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Solution

The fourth proportional to 28,131.60, 38,821.56 and 15,384.84 is: 21,231.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.60 : 38,821.56 = 15,384.84 : x
  2. Step 2: Convert to fraction form
    28,131.60/38,821.56 = 15,384.84/x
  3. Step 3: Cross multiply
    28,131.60x = 38,821.56 × 15,384.84
  4. Step 4: Simplify right side
    28,131.60x = 597,263,489.15
  5. Step 5: Solve for x
    x = 597,263,489.15/28,131.60
  6. Step 6: Final answer
    x = 21,231.05

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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.