Home / 8,916.36-12,317.39-7,121.48

Finding the Fourth Proportional to 8,916.36, 12,317.39 and 7,121.48

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Solution

The fourth proportional to 8,916.36, 12,317.39 and 7,121.48 is: 9,837.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.36 : 12,317.39 = 7,121.48 : x
  2. Step 2: Convert to fraction form
    8,916.36/12,317.39 = 7,121.48/x
  3. Step 3: Cross multiply
    8,916.36x = 12,317.39 × 7,121.48
  4. Step 4: Simplify right side
    8,916.36x = 87,718,068.43
  5. Step 5: Solve for x
    x = 87,718,068.43/8,916.36
  6. Step 6: Final answer
    x = 9,837.88

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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.