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Finding the Fourth Proportional to 18,481.08, 25,478.28 and 12,503.28

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Solution

The fourth proportional to 18,481.08, 25,478.28 and 12,503.28 is: 17,237.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.08 : 25,478.28 = 12,503.28 : x
  2. Step 2: Convert to fraction form
    18,481.08/25,478.28 = 12,503.28/x
  3. Step 3: Cross multiply
    18,481.08x = 25,478.28 × 12,503.28
  4. Step 4: Simplify right side
    18,481.08x = 318,562,068.76
  5. Step 5: Solve for x
    x = 318,562,068.76/18,481.08
  6. Step 6: Final answer
    x = 17,237.20

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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.