Home / 21,890.69-30,209.51-12,460.13

Finding the Fourth Proportional to 21,890.69, 30,209.51 and 12,460.13

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Solution

The fourth proportional to 21,890.69, 30,209.51 and 12,460.13 is: 17,195.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.69 : 30,209.51 = 12,460.13 : x
  2. Step 2: Convert to fraction form
    21,890.69/30,209.51 = 12,460.13/x
  3. Step 3: Cross multiply
    21,890.69x = 30,209.51 × 12,460.13
  4. Step 4: Simplify right side
    21,890.69x = 376,414,301.94
  5. Step 5: Solve for x
    x = 376,414,301.94/21,890.69
  6. Step 6: Final answer
    x = 17,195.18

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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.