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Finding the Fourth Proportional to 20,977.03, 28,952.13 and 13,903.30

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Solution

The fourth proportional to 20,977.03, 28,952.13 and 13,903.30 is: 19,189.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.03 : 28,952.13 = 13,903.30 : x
  2. Step 2: Convert to fraction form
    20,977.03/28,952.13 = 13,903.30/x
  3. Step 3: Cross multiply
    20,977.03x = 28,952.13 × 13,903.30
  4. Step 4: Simplify right side
    20,977.03x = 402,530,149.03
  5. Step 5: Solve for x
    x = 402,530,149.03/20,977.03
  6. Step 6: Final answer
    x = 19,189.09

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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.