Home / 12,919.12-17,838.30-9,390.76

Finding the Fourth Proportional to 12,919.12, 17,838.30 and 9,390.76

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Solution

The fourth proportional to 12,919.12, 17,838.30 and 9,390.76 is: 12,966.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.12 : 17,838.30 = 9,390.76 : x
  2. Step 2: Convert to fraction form
    12,919.12/17,838.30 = 9,390.76/x
  3. Step 3: Cross multiply
    12,919.12x = 17,838.30 × 9,390.76
  4. Step 4: Simplify right side
    12,919.12x = 167,515,194.11
  5. Step 5: Solve for x
    x = 167,515,194.11/12,919.12
  6. Step 6: Final answer
    x = 12,966.46

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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.