Home / 7,916.43-10,920.09-5,121.93

Finding the Fourth Proportional to 7,916.43, 10,920.09 and 5,121.93

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Solution

The fourth proportional to 7,916.43, 10,920.09 and 5,121.93 is: 7,065.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916.43 : 10,920.09 = 5,121.93 : x
  2. Step 2: Convert to fraction form
    7,916.43/10,920.09 = 5,121.93/x
  3. Step 3: Cross multiply
    7,916.43x = 10,920.09 × 5,121.93
  4. Step 4: Simplify right side
    7,916.43x = 55,931,936.57
  5. Step 5: Solve for x
    x = 55,931,936.57/7,916.43
  6. Step 6: Final answer
    x = 7,065.30

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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.