Home / 20,921.66-28,861.18-13,360.04

Finding the Fourth Proportional to 20,921.66, 28,861.18 and 13,360.04

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Solution

The fourth proportional to 20,921.66, 28,861.18 and 13,360.04 is: 18,430.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.66 : 28,861.18 = 13,360.04 : x
  2. Step 2: Convert to fraction form
    20,921.66/28,861.18 = 13,360.04/x
  3. Step 3: Cross multiply
    20,921.66x = 28,861.18 × 13,360.04
  4. Step 4: Simplify right side
    20,921.66x = 385,586,449.77
  5. Step 5: Solve for x
    x = 385,586,449.77/20,921.66
  6. Step 6: Final answer
    x = 18,430.01

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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.