Home / 20,666.80-28,524.12-12,287.92

Finding the Fourth Proportional to 20,666.80, 28,524.12 and 12,287.92

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Solution

The fourth proportional to 20,666.80, 28,524.12 and 12,287.92 is: 16,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.80 : 28,524.12 = 12,287.92 : x
  2. Step 2: Convert to fraction form
    20,666.80/28,524.12 = 12,287.92/x
  3. Step 3: Cross multiply
    20,666.80x = 28,524.12 × 12,287.92
  4. Step 4: Simplify right side
    20,666.80x = 350,502,104.63
  5. Step 5: Solve for x
    x = 350,502,104.63/20,666.80
  6. Step 6: Final answer
    x = 16,959.67

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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.