Home / 9,306.40-12,851.64-8,431.60

Finding the Fourth Proportional to 9,306.40, 12,851.64 and 8,431.60

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Solution

The fourth proportional to 9,306.40, 12,851.64 and 8,431.60 is: 11,643.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,306.40 : 12,851.64 = 8,431.60 : x
  2. Step 2: Convert to fraction form
    9,306.40/12,851.64 = 8,431.60/x
  3. Step 3: Cross multiply
    9,306.40x = 12,851.64 × 8,431.60
  4. Step 4: Simplify right side
    9,306.40x = 108,359,887.82
  5. Step 5: Solve for x
    x = 108,359,887.82/9,306.40
  6. Step 6: Final answer
    x = 11,643.59

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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.