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Finding the Fourth Proportional to 14,989.59, 20,688.08 and 8,940.60

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Solution

The fourth proportional to 14,989.59, 20,688.08 and 8,940.60 is: 12,339.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.59 : 20,688.08 = 8,940.60 : x
  2. Step 2: Convert to fraction form
    14,989.59/20,688.08 = 8,940.60/x
  3. Step 3: Cross multiply
    14,989.59x = 20,688.08 × 8,940.60
  4. Step 4: Simplify right side
    14,989.59x = 184,963,803.35
  5. Step 5: Solve for x
    x = 184,963,803.35/14,989.59
  6. Step 6: Final answer
    x = 12,339.48

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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.