Home / 20,878.48-28,812.60-12,493.36

Finding the Fourth Proportional to 20,878.48, 28,812.60 and 12,493.36

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Solution

The fourth proportional to 20,878.48, 28,812.60 and 12,493.36 is: 17,241.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.48 : 28,812.60 = 12,493.36 : x
  2. Step 2: Convert to fraction form
    20,878.48/28,812.60 = 12,493.36/x
  3. Step 3: Cross multiply
    20,878.48x = 28,812.60 × 12,493.36
  4. Step 4: Simplify right side
    20,878.48x = 359,966,184.34
  5. Step 5: Solve for x
    x = 359,966,184.34/20,878.48
  6. Step 6: Final answer
    x = 17,241.01

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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.