Home / 9,358.90-12,915.60-5,380.84

Finding the Fourth Proportional to 9,358.90, 12,915.60 and 5,380.84

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Solution

The fourth proportional to 9,358.90, 12,915.60 and 5,380.84 is: 7,425.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,358.90 : 12,915.60 = 5,380.84 : x
  2. Step 2: Convert to fraction form
    9,358.90/12,915.60 = 5,380.84/x
  3. Step 3: Cross multiply
    9,358.90x = 12,915.60 × 5,380.84
  4. Step 4: Simplify right side
    9,358.90x = 69,496,777.10
  5. Step 5: Solve for x
    x = 69,496,777.10/9,358.90
  6. Step 6: Final answer
    x = 7,425.74

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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.