Home / 15,814.70-21,806.50-10,781.86

Finding the Fourth Proportional to 15,814.70, 21,806.50 and 10,781.86

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Solution

The fourth proportional to 15,814.70, 21,806.50 and 10,781.86 is: 14,866.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,814.70 : 21,806.50 = 10,781.86 : x
  2. Step 2: Convert to fraction form
    15,814.70/21,806.50 = 10,781.86/x
  3. Step 3: Cross multiply
    15,814.70x = 21,806.50 × 10,781.86
  4. Step 4: Simplify right side
    15,814.70x = 235,114,630.09
  5. Step 5: Solve for x
    x = 235,114,630.09/15,814.70
  6. Step 6: Final answer
    x = 14,866.84

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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.