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Finding the Fourth Proportional to 7,890.97, 10,903.97 and 7,506.57

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Solution

The fourth proportional to 7,890.97, 10,903.97 and 7,506.57 is: 10,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.97 : 10,903.97 = 7,506.57 : x
  2. Step 2: Convert to fraction form
    7,890.97/10,903.97 = 7,506.57/x
  3. Step 3: Cross multiply
    7,890.97x = 10,903.97 × 7,506.57
  4. Step 4: Simplify right side
    7,890.97x = 81,851,376.55
  5. Step 5: Solve for x
    x = 81,851,376.55/7,890.97
  6. Step 6: Final answer
    x = 10,372.80

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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.