Home / 20,117.21-30,156.37-8,424.05

Finding the Fourth Proportional to 20,117.21, 30,156.37 and 8,424.05

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Solution

The fourth proportional to 20,117.21, 30,156.37 and 8,424.05 is: 12,627.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.21 : 30,156.37 = 8,424.05 : x
  2. Step 2: Convert to fraction form
    20,117.21/30,156.37 = 8,424.05/x
  3. Step 3: Cross multiply
    20,117.21x = 30,156.37 × 8,424.05
  4. Step 4: Simplify right side
    20,117.21x = 254,038,596.86
  5. Step 5: Solve for x
    x = 254,038,596.86/20,117.21
  6. Step 6: Final answer
    x = 12,627.93

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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.