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Finding the Fourth Proportional to 20,749.99, 31,129.59 and 5,957.77

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Solution

The fourth proportional to 20,749.99, 31,129.59 and 5,957.77 is: 8,937.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.99 : 31,129.59 = 5,957.77 : x
  2. Step 2: Convert to fraction form
    20,749.99/31,129.59 = 5,957.77/x
  3. Step 3: Cross multiply
    20,749.99x = 31,129.59 × 5,957.77
  4. Step 4: Simplify right side
    20,749.99x = 185,462,937.41
  5. Step 5: Solve for x
    x = 185,462,937.41/20,749.99
  6. Step 6: Final answer
    x = 8,937.98

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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.