Home / 21,851.13-30,154.77-12,419.76

Finding the Fourth Proportional to 21,851.13, 30,154.77 and 12,419.76

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Solution

The fourth proportional to 21,851.13, 30,154.77 and 12,419.76 is: 17,139.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.13 : 30,154.77 = 12,419.76 : x
  2. Step 2: Convert to fraction form
    21,851.13/30,154.77 = 12,419.76/x
  3. Step 3: Cross multiply
    21,851.13x = 30,154.77 × 12,419.76
  4. Step 4: Simplify right side
    21,851.13x = 374,515,006.26
  5. Step 5: Solve for x
    x = 374,515,006.26/21,851.13
  6. Step 6: Final answer
    x = 17,139.39

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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.