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Finding the Fourth Proportional to 20,798.76, 28,702.44 and 11,368.20

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Solution

The fourth proportional to 20,798.76, 28,702.44 and 11,368.20 is: 15,688.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.76 : 28,702.44 = 11,368.20 : x
  2. Step 2: Convert to fraction form
    20,798.76/28,702.44 = 11,368.20/x
  3. Step 3: Cross multiply
    20,798.76x = 28,702.44 × 11,368.20
  4. Step 4: Simplify right side
    20,798.76x = 326,295,078.41
  5. Step 5: Solve for x
    x = 326,295,078.41/20,798.76
  6. Step 6: Final answer
    x = 15,688.20

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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.