Home / 20,898.40-31,348.08-5,316.16

Finding the Fourth Proportional to 20,898.40, 31,348.08 and 5,316.16

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Solution

The fourth proportional to 20,898.40, 31,348.08 and 5,316.16 is: 7,974.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.40 : 31,348.08 = 5,316.16 : x
  2. Step 2: Convert to fraction form
    20,898.40/31,348.08 = 5,316.16/x
  3. Step 3: Cross multiply
    20,898.40x = 31,348.08 × 5,316.16
  4. Step 4: Simplify right side
    20,898.40x = 166,651,408.97
  5. Step 5: Solve for x
    x = 166,651,408.97/20,898.40
  6. Step 6: Final answer
    x = 7,974.36

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1.5x scale

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.