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Finding the Fourth Proportional to 12,871.54, 19,294.02 and 7,312.92

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Solution

The fourth proportional to 12,871.54, 19,294.02 and 7,312.92 is: 10,961.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,871.54 : 19,294.02 = 7,312.92 : x
  2. Step 2: Convert to fraction form
    12,871.54/19,294.02 = 7,312.92/x
  3. Step 3: Cross multiply
    12,871.54x = 19,294.02 × 7,312.92
  4. Step 4: Simplify right side
    12,871.54x = 141,095,528.27
  5. Step 5: Solve for x
    x = 141,095,528.27/12,871.54
  6. Step 6: Final answer
    x = 10,961.82

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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.