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Finding the Fourth Proportional to 18,647.81, 25,728.17 and 10,580.13

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Solution

The fourth proportional to 18,647.81, 25,728.17 and 10,580.13 is: 14,597.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.81 : 25,728.17 = 10,580.13 : x
  2. Step 2: Convert to fraction form
    18,647.81/25,728.17 = 10,580.13/x
  3. Step 3: Cross multiply
    18,647.81x = 25,728.17 × 10,580.13
  4. Step 4: Simplify right side
    18,647.81x = 272,207,330.36
  5. Step 5: Solve for x
    x = 272,207,330.36/18,647.81
  6. Step 6: Final answer
    x = 14,597.29

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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.