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Finding the Fourth Proportional to 7,909.85, 10,915.82 and 4,325.02

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Solution

The fourth proportional to 7,909.85, 10,915.82 and 4,325.02 is: 5,968.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.85 : 10,915.82 = 4,325.02 : x
  2. Step 2: Convert to fraction form
    7,909.85/10,915.82 = 4,325.02/x
  3. Step 3: Cross multiply
    7,909.85x = 10,915.82 × 4,325.02
  4. Step 4: Simplify right side
    7,909.85x = 47,211,085.24
  5. Step 5: Solve for x
    x = 47,211,085.24/7,909.85
  6. Step 6: Final answer
    x = 5,968.65

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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.