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Finding the Fourth Proportional to 14,989.41, 20,688.41 and 8,620.46

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Solution

The fourth proportional to 14,989.41, 20,688.41 and 8,620.46 is: 11,897.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.41 : 20,688.41 = 8,620.46 : x
  2. Step 2: Convert to fraction form
    14,989.41/20,688.41 = 8,620.46/x
  3. Step 3: Cross multiply
    14,989.41x = 20,688.41 × 8,620.46
  4. Step 4: Simplify right side
    14,989.41x = 178,343,464.32
  5. Step 5: Solve for x
    x = 178,343,464.32/14,989.41
  6. Step 6: Final answer
    x = 11,897.96

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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.