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Finding the Fourth Proportional to 12,646.20, 18,984.90 and 7,966.20

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Solution

The fourth proportional to 12,646.20, 18,984.90 and 7,966.20 is: 11,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,646.20 : 18,984.90 = 7,966.20 : x
  2. Step 2: Convert to fraction form
    12,646.20/18,984.90 = 7,966.20/x
  3. Step 3: Cross multiply
    12,646.20x = 18,984.90 × 7,966.20
  4. Step 4: Simplify right side
    12,646.20x = 151,237,510.38
  5. Step 5: Solve for x
    x = 151,237,510.38/12,646.20
  6. Step 6: Final answer
    x = 11,959.13

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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.