Home / 39,215.40-54,117.78-21,310.74

Finding the Fourth Proportional to 39,215.40, 54,117.78 and 21,310.74

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Solution

The fourth proportional to 39,215.40, 54,117.78 and 21,310.74 is: 29,409.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,215.40 : 54,117.78 = 21,310.74 : x
  2. Step 2: Convert to fraction form
    39,215.40/54,117.78 = 21,310.74/x
  3. Step 3: Cross multiply
    39,215.40x = 54,117.78 × 21,310.74
  4. Step 4: Simplify right side
    39,215.40x = 1,153,289,938.96
  5. Step 5: Solve for x
    x = 1,153,289,938.96/39,215.40
  6. Step 6: Final answer
    x = 29,409.11

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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.