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Finding the Fourth Proportional to 13,758.53, 18,988.35 and 12,914.06

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Solution

The fourth proportional to 13,758.53, 18,988.35 and 12,914.06 is: 17,822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.53 : 18,988.35 = 12,914.06 : x
  2. Step 2: Convert to fraction form
    13,758.53/18,988.35 = 12,914.06/x
  3. Step 3: Cross multiply
    13,758.53x = 18,988.35 × 12,914.06
  4. Step 4: Simplify right side
    13,758.53x = 245,216,691.20
  5. Step 5: Solve for x
    x = 245,216,691.20/13,758.53
  6. Step 6: Final answer
    x = 17,822.88

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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.