Home / 39,215.34-54,118.53-21,311.71

Finding the Fourth Proportional to 39,215.34, 54,118.53 and 21,311.71

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Solution

The fourth proportional to 39,215.34, 54,118.53 and 21,311.71 is: 29,410.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,215.34 : 54,118.53 = 21,311.71 : x
  2. Step 2: Convert to fraction form
    39,215.34/54,118.53 = 21,311.71/x
  3. Step 3: Cross multiply
    39,215.34x = 54,118.53 × 21,311.71
  4. Step 4: Simplify right side
    39,215.34x = 1,153,358,281.69
  5. Step 5: Solve for x
    x = 1,153,358,281.69/39,215.34
  6. Step 6: Final answer
    x = 29,410.90

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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.