Home / 8,919.41-12,307.01-5,382.81

Finding the Fourth Proportional to 8,919.41, 12,307.01 and 5,382.81

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Solution

The fourth proportional to 8,919.41, 12,307.01 and 5,382.81 is: 7,427.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.41 : 12,307.01 = 5,382.81 : x
  2. Step 2: Convert to fraction form
    8,919.41/12,307.01 = 5,382.81/x
  3. Step 3: Cross multiply
    8,919.41x = 12,307.01 × 5,382.81
  4. Step 4: Simplify right side
    8,919.41x = 66,246,269.58
  5. Step 5: Solve for x
    x = 66,246,269.58/8,919.41
  6. Step 6: Final answer
    x = 7,427.21

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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.