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Finding the Fourth Proportional to 13,903.52, 20,857.20 and 4,672.16

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Solution

The fourth proportional to 13,903.52, 20,857.20 and 4,672.16 is: 7,008.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.52 : 20,857.20 = 4,672.16 : x
  2. Step 2: Convert to fraction form
    13,903.52/20,857.20 = 4,672.16/x
  3. Step 3: Cross multiply
    13,903.52x = 20,857.20 × 4,672.16
  4. Step 4: Simplify right side
    13,903.52x = 97,448,175.55
  5. Step 5: Solve for x
    x = 97,448,175.55/13,903.52
  6. Step 6: Final answer
    x = 7,008.89

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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.