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Finding the Fourth Proportional to 20,898.59, 31,347.77 and 7,399.77

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Solution

The fourth proportional to 20,898.59, 31,347.77 and 7,399.77 is: 11,099.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.59 : 31,347.77 = 7,399.77 : x
  2. Step 2: Convert to fraction form
    20,898.59/31,347.77 = 7,399.77/x
  3. Step 3: Cross multiply
    20,898.59x = 31,347.77 × 7,399.77
  4. Step 4: Simplify right side
    20,898.59x = 231,966,288.01
  5. Step 5: Solve for x
    x = 231,966,288.01/20,898.59
  6. Step 6: Final answer
    x = 11,099.62

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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.