Home / 13,894.32-20,809.80-8,687.28

Finding the Fourth Proportional to 13,894.32, 20,809.80 and 8,687.28

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Solution

The fourth proportional to 13,894.32, 20,809.80 and 8,687.28 is: 13,011.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,894.32 : 20,809.80 = 8,687.28 : x
  2. Step 2: Convert to fraction form
    13,894.32/20,809.80 = 8,687.28/x
  3. Step 3: Cross multiply
    13,894.32x = 20,809.80 × 8,687.28
  4. Step 4: Simplify right side
    13,894.32x = 180,780,559.34
  5. Step 5: Solve for x
    x = 180,780,559.34/13,894.32
  6. Step 6: Final answer
    x = 13,011.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.