Home / 9,940.10-13,715.40-6,402.80

Finding the Fourth Proportional to 9,940.10, 13,715.40 and 6,402.80

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Solution

The fourth proportional to 9,940.10, 13,715.40 and 6,402.80 is: 8,834.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,940.10 : 13,715.40 = 6,402.80 : x
  2. Step 2: Convert to fraction form
    9,940.10/13,715.40 = 6,402.80/x
  3. Step 3: Cross multiply
    9,940.10x = 13,715.40 × 6,402.80
  4. Step 4: Simplify right side
    9,940.10x = 87,816,963.12
  5. Step 5: Solve for x
    x = 87,816,963.12/9,940.10
  6. Step 6: Final answer
    x = 8,834.62

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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.