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Finding the Fourth Proportional to 18,647.70, 25,731.99 and 10,688.10

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Solution

The fourth proportional to 18,647.70, 25,731.99 and 10,688.10 is: 14,748.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.70 : 25,731.99 = 10,688.10 : x
  2. Step 2: Convert to fraction form
    18,647.70/25,731.99 = 10,688.10/x
  3. Step 3: Cross multiply
    18,647.70x = 25,731.99 × 10,688.10
  4. Step 4: Simplify right side
    18,647.70x = 275,026,082.32
  5. Step 5: Solve for x
    x = 275,026,082.32/18,647.70
  6. Step 6: Final answer
    x = 14,748.53

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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.