Home / 12,378.15-17,081.61-7,000.49

Finding the Fourth Proportional to 12,378.15, 17,081.61 and 7,000.49

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Solution

The fourth proportional to 12,378.15, 17,081.61 and 7,000.49 is: 9,660.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.15 : 17,081.61 = 7,000.49 : x
  2. Step 2: Convert to fraction form
    12,378.15/17,081.61 = 7,000.49/x
  3. Step 3: Cross multiply
    12,378.15x = 17,081.61 × 7,000.49
  4. Step 4: Simplify right side
    12,378.15x = 119,579,639.99
  5. Step 5: Solve for x
    x = 119,579,639.99/12,378.15
  6. Step 6: Final answer
    x = 9,660.54

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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.