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Finding the Fourth Proportional to 12,009.48, 17,980.08 and 9,992.04

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Solution

The fourth proportional to 12,009.48, 17,980.08 and 9,992.04 is: 14,959.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,009.48 : 17,980.08 = 9,992.04 : x
  2. Step 2: Convert to fraction form
    12,009.48/17,980.08 = 9,992.04/x
  3. Step 3: Cross multiply
    12,009.48x = 17,980.08 × 9,992.04
  4. Step 4: Simplify right side
    12,009.48x = 179,657,678.56
  5. Step 5: Solve for x
    x = 179,657,678.56/12,009.48
  6. Step 6: Final answer
    x = 14,959.66

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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.