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Finding the Fourth Proportional to 13,578.60, 18,754.02 and 10,818.12

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Solution

The fourth proportional to 13,578.60, 18,754.02 and 10,818.12 is: 14,941.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.60 : 18,754.02 = 10,818.12 : x
  2. Step 2: Convert to fraction form
    13,578.60/18,754.02 = 10,818.12/x
  3. Step 3: Cross multiply
    13,578.60x = 18,754.02 × 10,818.12
  4. Step 4: Simplify right side
    13,578.60x = 202,883,238.84
  5. Step 5: Solve for x
    x = 202,883,238.84/13,578.60
  6. Step 6: Final answer
    x = 14,941.40

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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.