Home / 20,914.78-31,376.02-6,875.60

Finding the Fourth Proportional to 20,914.78, 31,376.02 and 6,875.60

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Solution

The fourth proportional to 20,914.78, 31,376.02 and 6,875.60 is: 10,314.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.78 : 31,376.02 = 6,875.60 : x
  2. Step 2: Convert to fraction form
    20,914.78/31,376.02 = 6,875.60/x
  3. Step 3: Cross multiply
    20,914.78x = 31,376.02 × 6,875.60
  4. Step 4: Simplify right side
    20,914.78x = 215,728,963.11
  5. Step 5: Solve for x
    x = 215,728,963.11/20,914.78
  6. Step 6: Final answer
    x = 10,314.67

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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.