Home / 8,425.28-12,639.89-2,878.67

Finding the Fourth Proportional to 8,425.28, 12,639.89 and 2,878.67

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Solution

The fourth proportional to 8,425.28, 12,639.89 and 2,878.67 is: 4,318.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.28 : 12,639.89 = 2,878.67 : x
  2. Step 2: Convert to fraction form
    8,425.28/12,639.89 = 2,878.67/x
  3. Step 3: Cross multiply
    8,425.28x = 12,639.89 × 2,878.67
  4. Step 4: Simplify right side
    8,425.28x = 36,386,008.95
  5. Step 5: Solve for x
    x = 36,386,008.95/8,425.28
  6. Step 6: Final answer
    x = 4,318.67

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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.