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Finding the Fourth Proportional to 18,626.79, 25,697.70 and 10,664.76

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Solution

The fourth proportional to 18,626.79, 25,697.70 and 10,664.76 is: 14,713.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.79 : 25,697.70 = 10,664.76 : x
  2. Step 2: Convert to fraction form
    18,626.79/25,697.70 = 10,664.76/x
  3. Step 3: Cross multiply
    18,626.79x = 25,697.70 × 10,664.76
  4. Step 4: Simplify right side
    18,626.79x = 274,059,803.05
  5. Step 5: Solve for x
    x = 274,059,803.05/18,626.79
  6. Step 6: Final answer
    x = 14,713.21

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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.