Home / 20,470.88-28,247.80-11,518.16

Finding the Fourth Proportional to 20,470.88, 28,247.80 and 11,518.16

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Solution

The fourth proportional to 20,470.88, 28,247.80 and 11,518.16 is: 15,893.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.88 : 28,247.80 = 11,518.16 : x
  2. Step 2: Convert to fraction form
    20,470.88/28,247.80 = 11,518.16/x
  3. Step 3: Cross multiply
    20,470.88x = 28,247.80 × 11,518.16
  4. Step 4: Simplify right side
    20,470.88x = 325,362,680.05
  5. Step 5: Solve for x
    x = 325,362,680.05/20,470.88
  6. Step 6: Final answer
    x = 15,893.93

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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.