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Finding the Fourth Proportional to 28,193.60, 38,898.40 and 16,255.40

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Solution

The fourth proportional to 28,193.60, 38,898.40 and 16,255.40 is: 22,427.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.60 : 38,898.40 = 16,255.40 : x
  2. Step 2: Convert to fraction form
    28,193.60/38,898.40 = 16,255.40/x
  3. Step 3: Cross multiply
    28,193.60x = 38,898.40 × 16,255.40
  4. Step 4: Simplify right side
    28,193.60x = 632,309,051.36
  5. Step 5: Solve for x
    x = 632,309,051.36/28,193.60
  6. Step 6: Final answer
    x = 22,427.40

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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.