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Finding the Fourth Proportional to 18,515.80, 25,551.69 and 10,017.90

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Solution

The fourth proportional to 18,515.80, 25,551.69 and 10,017.90 is: 13,824.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.80 : 25,551.69 = 10,017.90 : x
  2. Step 2: Convert to fraction form
    18,515.80/25,551.69 = 10,017.90/x
  3. Step 3: Cross multiply
    18,515.80x = 25,551.69 × 10,017.90
  4. Step 4: Simplify right side
    18,515.80x = 255,974,275.25
  5. Step 5: Solve for x
    x = 255,974,275.25/18,515.80
  6. Step 6: Final answer
    x = 13,824.64

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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.