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Finding the Fourth Proportional to 12,750.84, 19,131.32 and 5,728.95

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Solution

The fourth proportional to 12,750.84, 19,131.32 and 5,728.95 is: 8,595.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.84 : 19,131.32 = 5,728.95 : x
  2. Step 2: Convert to fraction form
    12,750.84/19,131.32 = 5,728.95/x
  3. Step 3: Cross multiply
    12,750.84x = 19,131.32 × 5,728.95
  4. Step 4: Simplify right side
    12,750.84x = 109,602,390.04
  5. Step 5: Solve for x
    x = 109,602,390.04/12,750.84
  6. Step 6: Final answer
    x = 8,595.70

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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.