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Finding the Fourth Proportional to 20,798.98, 28,702.47 and 11,367.55

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Solution

The fourth proportional to 20,798.98, 28,702.47 and 11,367.55 is: 15,687.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.98 : 28,702.47 = 11,367.55 : x
  2. Step 2: Convert to fraction form
    20,798.98/28,702.47 = 11,367.55/x
  3. Step 3: Cross multiply
    20,798.98x = 28,702.47 × 11,367.55
  4. Step 4: Simplify right side
    20,798.98x = 326,276,762.85
  5. Step 5: Solve for x
    x = 326,276,762.85/20,798.98
  6. Step 6: Final answer
    x = 15,687.15

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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.