Home / 20,343.39-30,520.59-18,391.50

Finding the Fourth Proportional to 20,343.39, 30,520.59 and 18,391.50

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Solution

The fourth proportional to 20,343.39, 30,520.59 and 18,391.50 is: 27,592.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.39 : 30,520.59 = 18,391.50 : x
  2. Step 2: Convert to fraction form
    20,343.39/30,520.59 = 18,391.50/x
  3. Step 3: Cross multiply
    20,343.39x = 30,520.59 × 18,391.50
  4. Step 4: Simplify right side
    20,343.39x = 561,319,430.99
  5. Step 5: Solve for x
    x = 561,319,430.99/20,343.39
  6. Step 6: Final answer
    x = 27,592.23

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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.