Home / 20,242.77-30,518.30-18,815.75

Finding the Fourth Proportional to 20,242.77, 30,518.30 and 18,815.75

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Solution

The fourth proportional to 20,242.77, 30,518.30 and 18,815.75 is: 28,366.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.77 : 30,518.30 = 18,815.75 : x
  2. Step 2: Convert to fraction form
    20,242.77/30,518.30 = 18,815.75/x
  3. Step 3: Cross multiply
    20,242.77x = 30,518.30 × 18,815.75
  4. Step 4: Simplify right side
    20,242.77x = 574,224,756.00
  5. Step 5: Solve for x
    x = 574,224,756.00/20,242.77
  6. Step 6: Final answer
    x = 28,366.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.