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Finding the Fourth Proportional to 14,775.86, 20,390.36 and 8,061.68

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Solution

The fourth proportional to 14,775.86, 20,390.36 and 8,061.68 is: 11,124.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,775.86 : 20,390.36 = 8,061.68 : x
  2. Step 2: Convert to fraction form
    14,775.86/20,390.36 = 8,061.68/x
  3. Step 3: Cross multiply
    14,775.86x = 20,390.36 × 8,061.68
  4. Step 4: Simplify right side
    14,775.86x = 164,380,557.40
  5. Step 5: Solve for x
    x = 164,380,557.40/14,775.86
  6. Step 6: Final answer
    x = 11,124.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.