Home / 20,118.32-30,331.84-18,763.12

Finding the Fourth Proportional to 20,118.32, 30,331.84 and 18,763.12

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Solution

The fourth proportional to 20,118.32, 30,331.84 and 18,763.12 is: 28,288.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.32 : 30,331.84 = 18,763.12 : x
  2. Step 2: Convert to fraction form
    20,118.32/30,331.84 = 18,763.12/x
  3. Step 3: Cross multiply
    20,118.32x = 30,331.84 × 18,763.12
  4. Step 4: Simplify right side
    20,118.32x = 569,119,953.74
  5. Step 5: Solve for x
    x = 569,119,953.74/20,118.32
  6. Step 6: Final answer
    x = 28,288.64

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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.