Home / 21,688.84-29,926.74-13,188.52

Finding the Fourth Proportional to 21,688.84, 29,926.74 and 13,188.52

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Solution

The fourth proportional to 21,688.84, 29,926.74 and 13,188.52 is: 18,197.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.84 : 29,926.74 = 13,188.52 : x
  2. Step 2: Convert to fraction form
    21,688.84/29,926.74 = 13,188.52/x
  3. Step 3: Cross multiply
    21,688.84x = 29,926.74 × 13,188.52
  4. Step 4: Simplify right side
    21,688.84x = 394,689,409.02
  5. Step 5: Solve for x
    x = 394,689,409.02/21,688.84
  6. Step 6: Final answer
    x = 18,197.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.