Home / 12,402.80-18,580.44-11,985.92

Finding the Fourth Proportional to 12,402.80, 18,580.44 and 11,985.92

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Solution

The fourth proportional to 12,402.80, 18,580.44 and 11,985.92 is: 17,955.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402.80 : 18,580.44 = 11,985.92 : x
  2. Step 2: Convert to fraction form
    12,402.80/18,580.44 = 11,985.92/x
  3. Step 3: Cross multiply
    12,402.80x = 18,580.44 × 11,985.92
  4. Step 4: Simplify right side
    12,402.80x = 222,703,667.40
  5. Step 5: Solve for x
    x = 222,703,667.40/12,402.80
  6. Step 6: Final answer
    x = 17,955.92

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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.