Home / 12,109.40-18,246.52-9,966.20

Finding the Fourth Proportional to 12,109.40, 18,246.52 and 9,966.20

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Solution

The fourth proportional to 12,109.40, 18,246.52 and 9,966.20 is: 15,017.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.40 : 18,246.52 = 9,966.20 : x
  2. Step 2: Convert to fraction form
    12,109.40/18,246.52 = 9,966.20/x
  3. Step 3: Cross multiply
    12,109.40x = 18,246.52 × 9,966.20
  4. Step 4: Simplify right side
    12,109.40x = 181,848,467.62
  5. Step 5: Solve for x
    x = 181,848,467.62/12,109.40
  6. Step 6: Final answer
    x = 15,017.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.