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Finding the Fourth Proportional to 13,503.66, 18,635.10 and 7,839.51

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Solution

The fourth proportional to 13,503.66, 18,635.10 and 7,839.51 is: 10,818.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,503.66 : 18,635.10 = 7,839.51 : x
  2. Step 2: Convert to fraction form
    13,503.66/18,635.10 = 7,839.51/x
  3. Step 3: Cross multiply
    13,503.66x = 18,635.10 × 7,839.51
  4. Step 4: Simplify right side
    13,503.66x = 146,090,052.80
  5. Step 5: Solve for x
    x = 146,090,052.80/13,503.66
  6. Step 6: Final answer
    x = 10,818.55

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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.