Home / 28,159.20-38,813.04-20,188.80

Finding the Fourth Proportional to 28,159.20, 38,813.04 and 20,188.80

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Solution

The fourth proportional to 28,159.20, 38,813.04 and 20,188.80 is: 27,827.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.20 : 38,813.04 = 20,188.80 : x
  2. Step 2: Convert to fraction form
    28,159.20/38,813.04 = 20,188.80/x
  3. Step 3: Cross multiply
    28,159.20x = 38,813.04 × 20,188.80
  4. Step 4: Simplify right side
    28,159.20x = 783,588,701.95
  5. Step 5: Solve for x
    x = 783,588,701.95/28,159.20
  6. Step 6: Final answer
    x = 27,827.09

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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.