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Finding the Fourth Proportional to 12,886.63, 19,329.30 and 7,552.78

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Solution

The fourth proportional to 12,886.63, 19,329.30 and 7,552.78 is: 11,328.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.63 : 19,329.30 = 7,552.78 : x
  2. Step 2: Convert to fraction form
    12,886.63/19,329.30 = 7,552.78/x
  3. Step 3: Cross multiply
    12,886.63x = 19,329.30 × 7,552.78
  4. Step 4: Simplify right side
    12,886.63x = 145,989,950.45
  5. Step 5: Solve for x
    x = 145,989,950.45/12,886.63
  6. Step 6: Final answer
    x = 11,328.79

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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.