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Finding the Fourth Proportional to 12,759.78, 19,140.07 and 10,555.82

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Solution

The fourth proportional to 12,759.78, 19,140.07 and 10,555.82 is: 15,834.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,759.78 : 19,140.07 = 10,555.82 : x
  2. Step 2: Convert to fraction form
    12,759.78/19,140.07 = 10,555.82/x
  3. Step 3: Cross multiply
    12,759.78x = 19,140.07 × 10,555.82
  4. Step 4: Simplify right side
    12,759.78x = 202,039,133.71
  5. Step 5: Solve for x
    x = 202,039,133.71/12,759.78
  6. Step 6: Final answer
    x = 15,834.06

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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.