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Finding the Fourth Proportional to 18,643.10, 25,728.02 and 10,145.77

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Solution

The fourth proportional to 18,643.10, 25,728.02 and 10,145.77 is: 14,001.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.10 : 25,728.02 = 10,145.77 : x
  2. Step 2: Convert to fraction form
    18,643.10/25,728.02 = 10,145.77/x
  3. Step 3: Cross multiply
    18,643.10x = 25,728.02 × 10,145.77
  4. Step 4: Simplify right side
    18,643.10x = 261,030,458.43
  5. Step 5: Solve for x
    x = 261,030,458.43/18,643.10
  6. Step 6: Final answer
    x = 14,001.45

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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.