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Finding the Fourth Proportional to 18,719.61, 25,833.06 and 10,763.40

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Solution

The fourth proportional to 18,719.61, 25,833.06 and 10,763.40 is: 14,853.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.61 : 25,833.06 = 10,763.40 : x
  2. Step 2: Convert to fraction form
    18,719.61/25,833.06 = 10,763.40/x
  3. Step 3: Cross multiply
    18,719.61x = 25,833.06 × 10,763.40
  4. Step 4: Simplify right side
    18,719.61x = 278,051,558.00
  5. Step 5: Solve for x
    x = 278,051,558.00/18,719.61
  6. Step 6: Final answer
    x = 14,853.49

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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.