Home / 15,390.96-21,147.18-12,241.68

Finding the Fourth Proportional to 15,390.96, 21,147.18 and 12,241.68

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Solution

The fourth proportional to 15,390.96, 21,147.18 and 12,241.68 is: 16,820.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.96 : 21,147.18 = 12,241.68 : x
  2. Step 2: Convert to fraction form
    15,390.96/21,147.18 = 12,241.68/x
  3. Step 3: Cross multiply
    15,390.96x = 21,147.18 × 12,241.68
  4. Step 4: Simplify right side
    15,390.96x = 258,877,010.46
  5. Step 5: Solve for x
    x = 258,877,010.46/15,390.96
  6. Step 6: Final answer
    x = 16,820.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.