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Finding the Fourth Proportional to 18,645.03, 25,717.13 and 12,666.32

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Solution

The fourth proportional to 18,645.03, 25,717.13 and 12,666.32 is: 17,470.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.03 : 25,717.13 = 12,666.32 : x
  2. Step 2: Convert to fraction form
    18,645.03/25,717.13 = 12,666.32/x
  3. Step 3: Cross multiply
    18,645.03x = 25,717.13 × 12,666.32
  4. Step 4: Simplify right side
    18,645.03x = 325,741,206.14
  5. Step 5: Solve for x
    x = 325,741,206.14/18,645.03
  6. Step 6: Final answer
    x = 17,470.67

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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.