Home / 20,917.84-28,880.14-12,968.50

Finding the Fourth Proportional to 20,917.84, 28,880.14 and 12,968.50

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Solution

The fourth proportional to 20,917.84, 28,880.14 and 12,968.50 is: 17,904.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.84 : 28,880.14 = 12,968.50 : x
  2. Step 2: Convert to fraction form
    20,917.84/28,880.14 = 12,968.50/x
  3. Step 3: Cross multiply
    20,917.84x = 28,880.14 × 12,968.50
  4. Step 4: Simplify right side
    20,917.84x = 374,532,095.59
  5. Step 5: Solve for x
    x = 374,532,095.59/20,917.84
  6. Step 6: Final answer
    x = 17,904.91

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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.