Home / 20,666.71-28,518.85-11,235.19

Finding the Fourth Proportional to 20,666.71, 28,518.85 and 11,235.19

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Solution

The fourth proportional to 20,666.71, 28,518.85 and 11,235.19 is: 15,503.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.71 : 28,518.85 = 11,235.19 : x
  2. Step 2: Convert to fraction form
    20,666.71/28,518.85 = 11,235.19/x
  3. Step 3: Cross multiply
    20,666.71x = 28,518.85 × 11,235.19
  4. Step 4: Simplify right side
    20,666.71x = 320,414,698.33
  5. Step 5: Solve for x
    x = 320,414,698.33/20,666.71
  6. Step 6: Final answer
    x = 15,503.90

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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.