Home / 39,216.12-54,118.50-21,311.28

Finding the Fourth Proportional to 39,216.12, 54,118.50 and 21,311.28

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Solution

The fourth proportional to 39,216.12, 54,118.50 and 21,311.28 is: 29,409.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,216.12 : 54,118.50 = 21,311.28 : x
  2. Step 2: Convert to fraction form
    39,216.12/54,118.50 = 21,311.28/x
  3. Step 3: Cross multiply
    39,216.12x = 54,118.50 × 21,311.28
  4. Step 4: Simplify right side
    39,216.12x = 1,153,334,506.68
  5. Step 5: Solve for x
    x = 1,153,334,506.68/39,216.12
  6. Step 6: Final answer
    x = 29,409.70

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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.