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Finding the Fourth Proportional to 13,695.68, 18,900.08 and 7,408.06

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Solution

The fourth proportional to 13,695.68, 18,900.08 and 7,408.06 is: 10,223.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.68 : 18,900.08 = 7,408.06 : x
  2. Step 2: Convert to fraction form
    13,695.68/18,900.08 = 7,408.06/x
  3. Step 3: Cross multiply
    13,695.68x = 18,900.08 × 7,408.06
  4. Step 4: Simplify right side
    13,695.68x = 140,012,926.64
  5. Step 5: Solve for x
    x = 140,012,926.64/13,695.68
  6. Step 6: Final answer
    x = 10,223.15

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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.