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Finding the Fourth Proportional to 20,436.60, 28,201.74 and 11,484.60

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Solution

The fourth proportional to 20,436.60, 28,201.74 and 11,484.60 is: 15,848.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.60 : 28,201.74 = 11,484.60 : x
  2. Step 2: Convert to fraction form
    20,436.60/28,201.74 = 11,484.60/x
  3. Step 3: Cross multiply
    20,436.60x = 28,201.74 × 11,484.60
  4. Step 4: Simplify right side
    20,436.60x = 323,885,703.20
  5. Step 5: Solve for x
    x = 323,885,703.20/20,436.60
  6. Step 6: Final answer
    x = 15,848.32

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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.