Home / 21,618.85-29,834.47-12,187.41

Finding the Fourth Proportional to 21,618.85, 29,834.47 and 12,187.41

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Solution

The fourth proportional to 21,618.85, 29,834.47 and 12,187.41 is: 16,818.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.85 : 29,834.47 = 12,187.41 : x
  2. Step 2: Convert to fraction form
    21,618.85/29,834.47 = 12,187.41/x
  3. Step 3: Cross multiply
    21,618.85x = 29,834.47 × 12,187.41
  4. Step 4: Simplify right side
    21,618.85x = 363,604,918.02
  5. Step 5: Solve for x
    x = 363,604,918.02/21,618.85
  6. Step 6: Final answer
    x = 16,818.88

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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.