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Finding the Fourth Proportional to 13,374.61, 18,465.93 and 8,340.87

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Solution

The fourth proportional to 13,374.61, 18,465.93 and 8,340.87 is: 11,515.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,374.61 : 18,465.93 = 8,340.87 : x
  2. Step 2: Convert to fraction form
    13,374.61/18,465.93 = 8,340.87/x
  3. Step 3: Cross multiply
    13,374.61x = 18,465.93 × 8,340.87
  4. Step 4: Simplify right side
    13,374.61x = 154,021,921.56
  5. Step 5: Solve for x
    x = 154,021,921.56/13,374.61
  6. Step 6: Final answer
    x = 11,515.99

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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.