Home / 20,210.41-30,311.50-5,415.87

Finding the Fourth Proportional to 20,210.41, 30,311.50 and 5,415.87

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Solution

The fourth proportional to 20,210.41, 30,311.50 and 5,415.87 is: 8,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.41 : 30,311.50 = 5,415.87 : x
  2. Step 2: Convert to fraction form
    20,210.41/30,311.50 = 5,415.87/x
  3. Step 3: Cross multiply
    20,210.41x = 30,311.50 × 5,415.87
  4. Step 4: Simplify right side
    20,210.41x = 164,163,143.51
  5. Step 5: Solve for x
    x = 164,163,143.51/20,210.41
  6. Step 6: Final answer
    x = 8,122.70

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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.