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Finding the Fourth Proportional to 21,395.64, 32,098.94 and 8,911.50

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Solution

The fourth proportional to 21,395.64, 32,098.94 and 8,911.50 is: 13,369.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,395.64 : 32,098.94 = 8,911.50 : x
  2. Step 2: Convert to fraction form
    21,395.64/32,098.94 = 8,911.50/x
  3. Step 3: Cross multiply
    21,395.64x = 32,098.94 × 8,911.50
  4. Step 4: Simplify right side
    21,395.64x = 286,049,703.81
  5. Step 5: Solve for x
    x = 286,049,703.81/21,395.64
  6. Step 6: Final answer
    x = 13,369.53

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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.