Home / 20,899.64-31,355.27-8,416.74

Finding the Fourth Proportional to 20,899.64, 31,355.27 and 8,416.74

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Solution

The fourth proportional to 20,899.64, 31,355.27 and 8,416.74 is: 12,627.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.64 : 31,355.27 = 8,416.74 : x
  2. Step 2: Convert to fraction form
    20,899.64/31,355.27 = 8,416.74/x
  3. Step 3: Cross multiply
    20,899.64x = 31,355.27 × 8,416.74
  4. Step 4: Simplify right side
    20,899.64x = 263,909,213.90
  5. Step 5: Solve for x
    x = 263,909,213.90/20,899.64
  6. Step 6: Final answer
    x = 12,627.45

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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.