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Finding the Fourth Proportional to 20,407.95, 30,582.72 and 11,624.72

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Solution

The fourth proportional to 20,407.95, 30,582.72 and 11,624.72 is: 17,420.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.95 : 30,582.72 = 11,624.72 : x
  2. Step 2: Convert to fraction form
    20,407.95/30,582.72 = 11,624.72/x
  3. Step 3: Cross multiply
    20,407.95x = 30,582.72 × 11,624.72
  4. Step 4: Simplify right side
    20,407.95x = 355,515,403.92
  5. Step 5: Solve for x
    x = 355,515,403.92/20,407.95
  6. Step 6: Final answer
    x = 17,420.44

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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.