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Finding the Fourth Proportional to 18,479.95, 25,495.09 and 11,394.07

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Solution

The fourth proportional to 18,479.95, 25,495.09 and 11,394.07 is: 15,719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.95 : 25,495.09 = 11,394.07 : x
  2. Step 2: Convert to fraction form
    18,479.95/25,495.09 = 11,394.07/x
  3. Step 3: Cross multiply
    18,479.95x = 25,495.09 × 11,394.07
  4. Step 4: Simplify right side
    18,479.95x = 290,492,840.12
  5. Step 5: Solve for x
    x = 290,492,840.12/18,479.95
  6. Step 6: Final answer
    x = 15,719.35

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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.