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Finding the Fourth Proportional to 13,054.90, 18,016.64 and 7,389.64

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Solution

The fourth proportional to 13,054.90, 18,016.64 and 7,389.64 is: 10,198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,054.90 : 18,016.64 = 7,389.64 : x
  2. Step 2: Convert to fraction form
    13,054.90/18,016.64 = 7,389.64/x
  3. Step 3: Cross multiply
    13,054.90x = 18,016.64 × 7,389.64
  4. Step 4: Simplify right side
    13,054.90x = 133,136,483.61
  5. Step 5: Solve for x
    x = 133,136,483.61/13,054.90
  6. Step 6: Final answer
    x = 10,198.20

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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.