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Finding the Fourth Proportional to 18,643.66, 25,728.51 and 10,260.34

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Solution

The fourth proportional to 18,643.66, 25,728.51 and 10,260.34 is: 14,159.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.66 : 25,728.51 = 10,260.34 : x
  2. Step 2: Convert to fraction form
    18,643.66/25,728.51 = 10,260.34/x
  3. Step 3: Cross multiply
    18,643.66x = 25,728.51 × 10,260.34
  4. Step 4: Simplify right side
    18,643.66x = 263,983,260.29
  5. Step 5: Solve for x
    x = 263,983,260.29/18,643.66
  6. Step 6: Final answer
    x = 14,159.41

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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.