Home / 20,828.40-31,242.60-6,977.40

Finding the Fourth Proportional to 20,828.40, 31,242.60 and 6,977.40

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Solution

The fourth proportional to 20,828.40, 31,242.60 and 6,977.40 is: 10,466.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.40 : 31,242.60 = 6,977.40 : x
  2. Step 2: Convert to fraction form
    20,828.40/31,242.60 = 6,977.40/x
  3. Step 3: Cross multiply
    20,828.40x = 31,242.60 × 6,977.40
  4. Step 4: Simplify right side
    20,828.40x = 217,992,117.24
  5. Step 5: Solve for x
    x = 217,992,117.24/20,828.40
  6. Step 6: Final answer
    x = 10,466.10

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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.