Home / 21,329.39-29,434.11-12,377.76

Finding the Fourth Proportional to 21,329.39, 29,434.11 and 12,377.76

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Solution

The fourth proportional to 21,329.39, 29,434.11 and 12,377.76 is: 17,081.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.39 : 29,434.11 = 12,377.76 : x
  2. Step 2: Convert to fraction form
    21,329.39/29,434.11 = 12,377.76/x
  3. Step 3: Cross multiply
    21,329.39x = 29,434.11 × 12,377.76
  4. Step 4: Simplify right side
    21,329.39x = 364,328,349.39
  5. Step 5: Solve for x
    x = 364,328,349.39/21,329.39
  6. Step 6: Final answer
    x = 17,081.05

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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.