Home / 21,905.26-30,218.42-12,948.46

Finding the Fourth Proportional to 21,905.26, 30,218.42 and 12,948.46

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Solution

The fourth proportional to 21,905.26, 30,218.42 and 12,948.46 is: 17,862.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.26 : 30,218.42 = 12,948.46 : x
  2. Step 2: Convert to fraction form
    21,905.26/30,218.42 = 12,948.46/x
  3. Step 3: Cross multiply
    21,905.26x = 30,218.42 × 12,948.46
  4. Step 4: Simplify right side
    21,905.26x = 391,282,002.63
  5. Step 5: Solve for x
    x = 391,282,002.63/21,905.26
  6. Step 6: Final answer
    x = 17,862.47

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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.