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Finding the Fourth Proportional to 14,989.55, 20,684.69 and 8,275.01

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Solution

The fourth proportional to 14,989.55, 20,684.69 and 8,275.01 is: 11,419.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.55 : 20,684.69 = 8,275.01 : x
  2. Step 2: Convert to fraction form
    14,989.55/20,684.69 = 8,275.01/x
  3. Step 3: Cross multiply
    14,989.55x = 20,684.69 × 8,275.01
  4. Step 4: Simplify right side
    14,989.55x = 171,165,975.22
  5. Step 5: Solve for x
    x = 171,165,975.22/14,989.55
  6. Step 6: Final answer
    x = 11,419.02

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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.