Home / 20,704.84-28,581.26-15,670.47

Finding the Fourth Proportional to 20,704.84, 28,581.26 and 15,670.47

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Solution

The fourth proportional to 20,704.84, 28,581.26 and 15,670.47 is: 21,631.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.84 : 28,581.26 = 15,670.47 : x
  2. Step 2: Convert to fraction form
    20,704.84/28,581.26 = 15,670.47/x
  3. Step 3: Cross multiply
    20,704.84x = 28,581.26 × 15,670.47
  4. Step 4: Simplify right side
    20,704.84x = 447,881,673.66
  5. Step 5: Solve for x
    x = 447,881,673.66/20,704.84
  6. Step 6: Final answer
    x = 21,631.74

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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.