Home / 9,390.30-12,958.12-5,140.55

Finding the Fourth Proportional to 9,390.30, 12,958.12 and 5,140.55

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Solution

The fourth proportional to 9,390.30, 12,958.12 and 5,140.55 is: 7,093.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,390.30 : 12,958.12 = 5,140.55 : x
  2. Step 2: Convert to fraction form
    9,390.30/12,958.12 = 5,140.55/x
  3. Step 3: Cross multiply
    9,390.30x = 12,958.12 × 5,140.55
  4. Step 4: Simplify right side
    9,390.30x = 66,611,862.38
  5. Step 5: Solve for x
    x = 66,611,862.38/9,390.30
  6. Step 6: Final answer
    x = 7,093.69

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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.