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Finding the Fourth Proportional to 13,999.68, 20,999.52 and 9,603.81

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Solution

The fourth proportional to 13,999.68, 20,999.52 and 9,603.81 is: 14,405.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.68 : 20,999.52 = 9,603.81 : x
  2. Step 2: Convert to fraction form
    13,999.68/20,999.52 = 9,603.81/x
  3. Step 3: Cross multiply
    13,999.68x = 20,999.52 × 9,603.81
  4. Step 4: Simplify right side
    13,999.68x = 201,675,400.17
  5. Step 5: Solve for x
    x = 201,675,400.17/13,999.68
  6. Step 6: Final answer
    x = 14,405.72

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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.