Home / 21,677.31-29,910.80-12,117.39

Finding the Fourth Proportional to 21,677.31, 29,910.80 and 12,117.39

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Solution

The fourth proportional to 21,677.31, 29,910.80 and 12,117.39 is: 16,719.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,677.31 : 29,910.80 = 12,117.39 : x
  2. Step 2: Convert to fraction form
    21,677.31/29,910.80 = 12,117.39/x
  3. Step 3: Cross multiply
    21,677.31x = 29,910.80 × 12,117.39
  4. Step 4: Simplify right side
    21,677.31x = 362,440,768.23
  5. Step 5: Solve for x
    x = 362,440,768.23/21,677.31
  6. Step 6: Final answer
    x = 16,719.82

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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.