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Finding the Fourth Proportional to 18,619.20, 25,702.56 and 13,245.12

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Solution

The fourth proportional to 18,619.20, 25,702.56 and 13,245.12 is: 18,284.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.20 : 25,702.56 = 13,245.12 : x
  2. Step 2: Convert to fraction form
    18,619.20/25,702.56 = 13,245.12/x
  3. Step 3: Cross multiply
    18,619.20x = 25,702.56 × 13,245.12
  4. Step 4: Simplify right side
    18,619.20x = 340,433,491.51
  5. Step 5: Solve for x
    x = 340,433,491.51/18,619.20
  6. Step 6: Final answer
    x = 18,284.00

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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.