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Finding the Fourth Proportional to 7,059.40, 9,742.02 and 3,915.80

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Solution

The fourth proportional to 7,059.40, 9,742.02 and 3,915.80 is: 5,403.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,059.40 : 9,742.02 = 3,915.80 : x
  2. Step 2: Convert to fraction form
    7,059.40/9,742.02 = 3,915.80/x
  3. Step 3: Cross multiply
    7,059.40x = 9,742.02 × 3,915.80
  4. Step 4: Simplify right side
    7,059.40x = 38,147,801.92
  5. Step 5: Solve for x
    x = 38,147,801.92/7,059.40
  6. Step 6: Final answer
    x = 5,403.83

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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.