Home / 39,434.85-54,420.86-21,529.90

Finding the Fourth Proportional to 39,434.85, 54,420.86 and 21,529.90

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Solution

The fourth proportional to 39,434.85, 54,420.86 and 21,529.90 is: 29,711.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,434.85 : 54,420.86 = 21,529.90 : x
  2. Step 2: Convert to fraction form
    39,434.85/54,420.86 = 21,529.90/x
  3. Step 3: Cross multiply
    39,434.85x = 54,420.86 × 21,529.90
  4. Step 4: Simplify right side
    39,434.85x = 1,171,675,795.56
  5. Step 5: Solve for x
    x = 1,171,675,795.56/39,434.85
  6. Step 6: Final answer
    x = 29,711.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.