Home / 21,370.29-29,488.82-12,419.70

Finding the Fourth Proportional to 21,370.29, 29,488.82 and 12,419.70

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Solution

The fourth proportional to 21,370.29, 29,488.82 and 12,419.70 is: 17,137.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.29 : 29,488.82 = 12,419.70 : x
  2. Step 2: Convert to fraction form
    21,370.29/29,488.82 = 12,419.70/x
  3. Step 3: Cross multiply
    21,370.29x = 29,488.82 × 12,419.70
  4. Step 4: Simplify right side
    21,370.29x = 366,242,235.66
  5. Step 5: Solve for x
    x = 366,242,235.66/21,370.29
  6. Step 6: Final answer
    x = 17,137.92

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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.