Home / 21,880.50-30,195.12-13,501.86

Finding the Fourth Proportional to 21,880.50, 30,195.12 and 13,501.86

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Solution

The fourth proportional to 21,880.50, 30,195.12 and 13,501.86 is: 18,632.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880.50 : 30,195.12 = 13,501.86 : x
  2. Step 2: Convert to fraction form
    21,880.50/30,195.12 = 13,501.86/x
  3. Step 3: Cross multiply
    21,880.50x = 30,195.12 × 13,501.86
  4. Step 4: Simplify right side
    21,880.50x = 407,690,282.92
  5. Step 5: Solve for x
    x = 407,690,282.92/21,880.50
  6. Step 6: Final answer
    x = 18,632.59

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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.