Home / 21,162.56-29,191.05-13,618.67

Finding the Fourth Proportional to 21,162.56, 29,191.05 and 13,618.67

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Solution

The fourth proportional to 21,162.56, 29,191.05 and 13,618.67 is: 18,785.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.56 : 29,191.05 = 13,618.67 : x
  2. Step 2: Convert to fraction form
    21,162.56/29,191.05 = 13,618.67/x
  3. Step 3: Cross multiply
    21,162.56x = 29,191.05 × 13,618.67
  4. Step 4: Simplify right side
    21,162.56x = 397,543,130.95
  5. Step 5: Solve for x
    x = 397,543,130.95/21,162.56
  6. Step 6: Final answer
    x = 18,785.21

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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.