Home / 20,740.96-28,623.12-11,309.68

Finding the Fourth Proportional to 20,740.96, 28,623.12 and 11,309.68

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Solution

The fourth proportional to 20,740.96, 28,623.12 and 11,309.68 is: 15,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.96 : 28,623.12 = 11,309.68 : x
  2. Step 2: Convert to fraction form
    20,740.96/28,623.12 = 11,309.68/x
  3. Step 3: Cross multiply
    20,740.96x = 28,623.12 × 11,309.68
  4. Step 4: Simplify right side
    20,740.96x = 323,718,327.80
  5. Step 5: Solve for x
    x = 323,718,327.80/20,740.96
  6. Step 6: Final answer
    x = 15,607.68

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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.