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Finding the Fourth Proportional to 15,004.60, 20,712.18 and 13,429.96

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Solution

The fourth proportional to 15,004.60, 20,712.18 and 13,429.96 is: 18,538.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,004.60 : 20,712.18 = 13,429.96 : x
  2. Step 2: Convert to fraction form
    15,004.60/20,712.18 = 13,429.96/x
  3. Step 3: Cross multiply
    15,004.60x = 20,712.18 × 13,429.96
  4. Step 4: Simplify right side
    15,004.60x = 278,163,748.91
  5. Step 5: Solve for x
    x = 278,163,748.91/15,004.60
  6. Step 6: Final answer
    x = 18,538.56

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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.