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Finding the Fourth Proportional to 18,758.81, 25,886.70 and 10,260.99

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Solution

The fourth proportional to 18,758.81, 25,886.70 and 10,260.99 is: 14,159.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.81 : 25,886.70 = 10,260.99 : x
  2. Step 2: Convert to fraction form
    18,758.81/25,886.70 = 10,260.99/x
  3. Step 3: Cross multiply
    18,758.81x = 25,886.70 × 10,260.99
  4. Step 4: Simplify right side
    18,758.81x = 265,623,169.83
  5. Step 5: Solve for x
    x = 265,623,169.83/18,758.81
  6. Step 6: Final answer
    x = 14,159.92

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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.