Home / 18,681.40-27,999.90-9,911.80

Finding the Fourth Proportional to 18,681.40, 27,999.90 and 9,911.80

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Solution

The fourth proportional to 18,681.40, 27,999.90 and 9,911.80 is: 14,855.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.40 : 27,999.90 = 9,911.80 : x
  2. Step 2: Convert to fraction form
    18,681.40/27,999.90 = 9,911.80/x
  3. Step 3: Cross multiply
    18,681.40x = 27,999.90 × 9,911.80
  4. Step 4: Simplify right side
    18,681.40x = 277,529,408.82
  5. Step 5: Solve for x
    x = 277,529,408.82/18,681.40
  6. Step 6: Final answer
    x = 14,855.92

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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.