Home / 20,470.32-28,244.80-11,970.79

Finding the Fourth Proportional to 20,470.32, 28,244.80 and 11,970.79

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Solution

The fourth proportional to 20,470.32, 28,244.80 and 11,970.79 is: 16,517.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.32 : 28,244.80 = 11,970.79 : x
  2. Step 2: Convert to fraction form
    20,470.32/28,244.80 = 11,970.79/x
  3. Step 3: Cross multiply
    20,470.32x = 28,244.80 × 11,970.79
  4. Step 4: Simplify right side
    20,470.32x = 338,112,513.74
  5. Step 5: Solve for x
    x = 338,112,513.74/20,470.32
  6. Step 6: Final answer
    x = 16,517.21

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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.