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Finding the Fourth Proportional to 38,568.40, 53,223.56 and 20,904.40

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Solution

The fourth proportional to 38,568.40, 53,223.56 and 20,904.40 is: 28,847.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,568.40 : 53,223.56 = 20,904.40 : x
  2. Step 2: Convert to fraction form
    38,568.40/53,223.56 = 20,904.40/x
  3. Step 3: Cross multiply
    38,568.40x = 53,223.56 × 20,904.40
  4. Step 4: Simplify right side
    38,568.40x = 1,112,606,587.66
  5. Step 5: Solve for x
    x = 1,112,606,587.66/38,568.40
  6. Step 6: Final answer
    x = 28,847.62

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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.