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Finding the Fourth Proportional to 20,602.74, 28,369.08 and 18,702.78

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Solution

The fourth proportional to 20,602.74, 28,369.08 and 18,702.78 is: 25,752.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.74 : 28,369.08 = 18,702.78 : x
  2. Step 2: Convert to fraction form
    20,602.74/28,369.08 = 18,702.78/x
  3. Step 3: Cross multiply
    20,602.74x = 28,369.08 × 18,702.78
  4. Step 4: Simplify right side
    20,602.74x = 530,580,662.04
  5. Step 5: Solve for x
    x = 530,580,662.04/20,602.74
  6. Step 6: Final answer
    x = 25,752.92

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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.