Home / 13,140.62-19,661.51-7,856.18

Finding the Fourth Proportional to 13,140.62, 19,661.51 and 7,856.18

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Solution

The fourth proportional to 13,140.62, 19,661.51 and 7,856.18 is: 11,754.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.62 : 19,661.51 = 7,856.18 : x
  2. Step 2: Convert to fraction form
    13,140.62/19,661.51 = 7,856.18/x
  3. Step 3: Cross multiply
    13,140.62x = 19,661.51 × 7,856.18
  4. Step 4: Simplify right side
    13,140.62x = 154,464,282.96
  5. Step 5: Solve for x
    x = 154,464,282.96/13,140.62
  6. Step 6: Final answer
    x = 11,754.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.