Home / 20,317.12-30,484.76-12,919.60

Finding the Fourth Proportional to 20,317.12, 30,484.76 and 12,919.60

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Solution

The fourth proportional to 20,317.12, 30,484.76 and 12,919.60 is: 19,385.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.12 : 30,484.76 = 12,919.60 : x
  2. Step 2: Convert to fraction form
    20,317.12/30,484.76 = 12,919.60/x
  3. Step 3: Cross multiply
    20,317.12x = 30,484.76 × 12,919.60
  4. Step 4: Simplify right side
    20,317.12x = 393,850,905.30
  5. Step 5: Solve for x
    x = 393,850,905.30/20,317.12
  6. Step 6: Final answer
    x = 19,385.17

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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.