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Finding the Fourth Proportional to 12,681.70, 19,024.27 and 11,982.20

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Solution

The fourth proportional to 12,681.70, 19,024.27 and 11,982.20 is: 17,974.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.70 : 19,024.27 = 11,982.20 : x
  2. Step 2: Convert to fraction form
    12,681.70/19,024.27 = 11,982.20/x
  3. Step 3: Cross multiply
    12,681.70x = 19,024.27 × 11,982.20
  4. Step 4: Simplify right side
    12,681.70x = 227,952,482.92
  5. Step 5: Solve for x
    x = 227,952,482.92/12,681.70
  6. Step 6: Final answer
    x = 17,974.92

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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.