Home / 21,877.75-30,189.48-12,318.51

Finding the Fourth Proportional to 21,877.75, 30,189.48 and 12,318.51

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Solution

The fourth proportional to 21,877.75, 30,189.48 and 12,318.51 is: 16,998.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,877.75 : 30,189.48 = 12,318.51 : x
  2. Step 2: Convert to fraction form
    21,877.75/30,189.48 = 12,318.51/x
  3. Step 3: Cross multiply
    21,877.75x = 30,189.48 × 12,318.51
  4. Step 4: Simplify right side
    21,877.75x = 371,889,327.50
  5. Step 5: Solve for x
    x = 371,889,327.50/21,877.75
  6. Step 6: Final answer
    x = 16,998.52

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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.