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Finding the Fourth Proportional to 13,490.76, 20,235.90 and 5,282.76

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Solution

The fourth proportional to 13,490.76, 20,235.90 and 5,282.76 is: 7,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.76 : 20,235.90 = 5,282.76 : x
  2. Step 2: Convert to fraction form
    13,490.76/20,235.90 = 5,282.76/x
  3. Step 3: Cross multiply
    13,490.76x = 20,235.90 × 5,282.76
  4. Step 4: Simplify right side
    13,490.76x = 106,901,403.08
  5. Step 5: Solve for x
    x = 106,901,403.08/13,490.76
  6. Step 6: Final answer
    x = 7,924.05

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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.