Home / 39,212.78-54,114.18-21,308.12

Finding the Fourth Proportional to 39,212.78, 54,114.18 and 21,308.12

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Solution

The fourth proportional to 39,212.78, 54,114.18 and 21,308.12 is: 29,405.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,212.78 : 54,114.18 = 21,308.12 : x
  2. Step 2: Convert to fraction form
    39,212.78/54,114.18 = 21,308.12/x
  3. Step 3: Cross multiply
    39,212.78x = 54,114.18 × 21,308.12
  4. Step 4: Simplify right side
    39,212.78x = 1,153,071,441.14
  5. Step 5: Solve for x
    x = 1,153,071,441.14/39,212.78
  6. Step 6: Final answer
    x = 29,405.50

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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.