Home / 39,626.32-54,685-21,720.18

Finding the Fourth Proportional to 39,626.32, 54,685 and 21,720.18

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Solution

The fourth proportional to 39,626.32, 54,685 and 21,720.18 is: 29,974.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,626.32 : 54,685 = 21,720.18 : x
  2. Step 2: Convert to fraction form
    39,626.32/54,685 = 21,720.18/x
  3. Step 3: Cross multiply
    39,626.32x = 54,685 × 21,720.18
  4. Step 4: Simplify right side
    39,626.32x = 1,187,768,043.30
  5. Step 5: Solve for x
    x = 1,187,768,043.30/39,626.32
  6. Step 6: Final answer
    x = 29,974.22

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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.