Home / 27,705.32-38,220.04-20,139.92

Finding the Fourth Proportional to 27,705.32, 38,220.04 and 20,139.92

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Solution

The fourth proportional to 27,705.32, 38,220.04 and 20,139.92 is: 27,783.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,705.32 : 38,220.04 = 20,139.92 : x
  2. Step 2: Convert to fraction form
    27,705.32/38,220.04 = 20,139.92/x
  3. Step 3: Cross multiply
    27,705.32x = 38,220.04 × 20,139.92
  4. Step 4: Simplify right side
    27,705.32x = 769,748,548.00
  5. Step 5: Solve for x
    x = 769,748,548.00/27,705.32
  6. Step 6: Final answer
    x = 27,783.42

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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.