Home / 8,900.40-12,281.55-4,920.51

Finding the Fourth Proportional to 8,900.40, 12,281.55 and 4,920.51

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Solution

The fourth proportional to 8,900.40, 12,281.55 and 4,920.51 is: 6,789.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,900.40 : 12,281.55 = 4,920.51 : x
  2. Step 2: Convert to fraction form
    8,900.40/12,281.55 = 4,920.51/x
  3. Step 3: Cross multiply
    8,900.40x = 12,281.55 × 4,920.51
  4. Step 4: Simplify right side
    8,900.40x = 60,431,489.59
  5. Step 5: Solve for x
    x = 60,431,489.59/8,900.40
  6. Step 6: Final answer
    x = 6,789.75

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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.