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Finding the Fourth Proportional to 31,477.60, 47,331.60 and 26,408.80

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Solution

The fourth proportional to 31,477.60, 47,331.60 and 26,408.80 is: 39,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,477.60 : 47,331.60 = 26,408.80 : x
  2. Step 2: Convert to fraction form
    31,477.60/47,331.60 = 26,408.80/x
  3. Step 3: Cross multiply
    31,477.60x = 47,331.60 × 26,408.80
  4. Step 4: Simplify right side
    31,477.60x = 1,249,970,758.08
  5. Step 5: Solve for x
    x = 1,249,970,758.08/31,477.60
  6. Step 6: Final answer
    x = 39,709.85

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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.