Home / 8,458.28-12,689.69-2,911.71

Finding the Fourth Proportional to 8,458.28, 12,689.69 and 2,911.71

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Solution

The fourth proportional to 8,458.28, 12,689.69 and 2,911.71 is: 4,368.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.28 : 12,689.69 = 2,911.71 : x
  2. Step 2: Convert to fraction form
    8,458.28/12,689.69 = 2,911.71/x
  3. Step 3: Cross multiply
    8,458.28x = 12,689.69 × 2,911.71
  4. Step 4: Simplify right side
    8,458.28x = 36,948,682.71
  5. Step 5: Solve for x
    x = 36,948,682.71/8,458.28
  6. Step 6: Final answer
    x = 4,368.35

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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.