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Finding the Fourth Proportional to 18,377.91, 25,360.74 and 10,420.67

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Solution

The fourth proportional to 18,377.91, 25,360.74 and 10,420.67 is: 14,380.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,377.91 : 25,360.74 = 10,420.67 : x
  2. Step 2: Convert to fraction form
    18,377.91/25,360.74 = 10,420.67/x
  3. Step 3: Cross multiply
    18,377.91x = 25,360.74 × 10,420.67
  4. Step 4: Simplify right side
    18,377.91x = 264,275,775.69
  5. Step 5: Solve for x
    x = 264,275,775.69/18,377.91
  6. Step 6: Final answer
    x = 14,380.08

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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.