Home / 21,645.29-29,871.09-12,084.80

Finding the Fourth Proportional to 21,645.29, 29,871.09 and 12,084.80

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Solution

The fourth proportional to 21,645.29, 29,871.09 and 12,084.80 is: 16,677.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.29 : 29,871.09 = 12,084.80 : x
  2. Step 2: Convert to fraction form
    21,645.29/29,871.09 = 12,084.80/x
  3. Step 3: Cross multiply
    21,645.29x = 29,871.09 × 12,084.80
  4. Step 4: Simplify right side
    21,645.29x = 360,986,280.49
  5. Step 5: Solve for x
    x = 360,986,280.49/21,645.29
  6. Step 6: Final answer
    x = 16,677.36

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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.