Home / 8,428.10-11,630.72-4,891.23

Finding the Fourth Proportional to 8,428.10, 11,630.72 and 4,891.23

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Solution

The fourth proportional to 8,428.10, 11,630.72 and 4,891.23 is: 6,749.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.10 : 11,630.72 = 4,891.23 : x
  2. Step 2: Convert to fraction form
    8,428.10/11,630.72 = 4,891.23/x
  3. Step 3: Cross multiply
    8,428.10x = 11,630.72 × 4,891.23
  4. Step 4: Simplify right side
    8,428.10x = 56,888,538.81
  5. Step 5: Solve for x
    x = 56,888,538.81/8,428.10
  6. Step 6: Final answer
    x = 6,749.87

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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.