Home / 20,916.84-28,878.76-12,967.50

Finding the Fourth Proportional to 20,916.84, 28,878.76 and 12,967.50

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Solution

The fourth proportional to 20,916.84, 28,878.76 and 12,967.50 is: 17,903.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.84 : 28,878.76 = 12,967.50 : x
  2. Step 2: Convert to fraction form
    20,916.84/28,878.76 = 12,967.50/x
  3. Step 3: Cross multiply
    20,916.84x = 28,878.76 × 12,967.50
  4. Step 4: Simplify right side
    20,916.84x = 374,485,320.30
  5. Step 5: Solve for x
    x = 374,485,320.30/20,916.84
  6. Step 6: Final answer
    x = 17,903.53

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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.