Home / 13,888.56-20,821.32-6,489.12

Finding the Fourth Proportional to 13,888.56, 20,821.32 and 6,489.12

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Solution

The fourth proportional to 13,888.56, 20,821.32 and 6,489.12 is: 9,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.56 : 20,821.32 = 6,489.12 : x
  2. Step 2: Convert to fraction form
    13,888.56/20,821.32 = 6,489.12/x
  3. Step 3: Cross multiply
    13,888.56x = 20,821.32 × 6,489.12
  4. Step 4: Simplify right side
    13,888.56x = 135,112,044.04
  5. Step 5: Solve for x
    x = 135,112,044.04/13,888.56
  6. Step 6: Final answer
    x = 9,728.30

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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.