Home / 20,898.50-31,349.58-5,316.13

Finding the Fourth Proportional to 20,898.50, 31,349.58 and 5,316.13

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Solution

The fourth proportional to 20,898.50, 31,349.58 and 5,316.13 is: 7,974.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.50 : 31,349.58 = 5,316.13 : x
  2. Step 2: Convert to fraction form
    20,898.50/31,349.58 = 5,316.13/x
  3. Step 3: Cross multiply
    20,898.50x = 31,349.58 × 5,316.13
  4. Step 4: Simplify right side
    20,898.50x = 166,658,259.40
  5. Step 5: Solve for x
    x = 166,658,259.40/20,898.50
  6. Step 6: Final answer
    x = 7,974.65

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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.