Home / 20,430.25-30,591.90-13,388.11

Finding the Fourth Proportional to 20,430.25, 30,591.90 and 13,388.11

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Solution

The fourth proportional to 20,430.25, 30,591.90 and 13,388.11 is: 20,047.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.25 : 30,591.90 = 13,388.11 : x
  2. Step 2: Convert to fraction form
    20,430.25/30,591.90 = 13,388.11/x
  3. Step 3: Cross multiply
    20,430.25x = 30,591.90 × 13,388.11
  4. Step 4: Simplify right side
    20,430.25x = 409,567,569.35
  5. Step 5: Solve for x
    x = 409,567,569.35/20,430.25
  6. Step 6: Final answer
    x = 20,047.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.