Home / 9,821.68-13,555.26-6,678.88

Finding the Fourth Proportional to 9,821.68, 13,555.26 and 6,678.88

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Solution

The fourth proportional to 9,821.68, 13,555.26 and 6,678.88 is: 9,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,821.68 : 13,555.26 = 6,678.88 : x
  2. Step 2: Convert to fraction form
    9,821.68/13,555.26 = 6,678.88/x
  3. Step 3: Cross multiply
    9,821.68x = 13,555.26 × 6,678.88
  4. Step 4: Simplify right side
    9,821.68x = 90,533,954.91
  5. Step 5: Solve for x
    x = 90,533,954.91/9,821.68
  6. Step 6: Final answer
    x = 9,217.77

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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.