Home / 20,898.30-31,347.27-5,315.88

Finding the Fourth Proportional to 20,898.30, 31,347.27 and 5,315.88

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Solution

The fourth proportional to 20,898.30, 31,347.27 and 5,315.88 is: 7,973.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.30 : 31,347.27 = 5,315.88 : x
  2. Step 2: Convert to fraction form
    20,898.30/31,347.27 = 5,315.88/x
  3. Step 3: Cross multiply
    20,898.30x = 31,347.27 × 5,315.88
  4. Step 4: Simplify right side
    20,898.30x = 166,638,325.65
  5. Step 5: Solve for x
    x = 166,638,325.65/20,898.30
  6. Step 6: Final answer
    x = 7,973.77

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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.