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Finding the Fourth Proportional to 39,703.56, 54,790.74 and 21,798.12

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Solution

The fourth proportional to 39,703.56, 54,790.74 and 21,798.12 is: 30,081.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,703.56 : 54,790.74 = 21,798.12 : x
  2. Step 2: Convert to fraction form
    39,703.56/54,790.74 = 21,798.12/x
  3. Step 3: Cross multiply
    39,703.56x = 54,790.74 × 21,798.12
  4. Step 4: Simplify right side
    39,703.56x = 1,194,335,125.41
  5. Step 5: Solve for x
    x = 1,194,335,125.41/39,703.56
  6. Step 6: Final answer
    x = 30,081.31

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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.