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Finding the Fourth Proportional to 18,373.17, 25,354.89 and 9,989.67

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Solution

The fourth proportional to 18,373.17, 25,354.89 and 9,989.67 is: 13,785.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,373.17 : 25,354.89 = 9,989.67 : x
  2. Step 2: Convert to fraction form
    18,373.17/25,354.89 = 9,989.67/x
  3. Step 3: Cross multiply
    18,373.17x = 25,354.89 × 9,989.67
  4. Step 4: Simplify right side
    18,373.17x = 253,286,983.99
  5. Step 5: Solve for x
    x = 253,286,983.99/18,373.17
  6. Step 6: Final answer
    x = 13,785.70

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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.