Home / 18,378.12-25,376.09-14,122.47

Finding the Fourth Proportional to 18,378.12, 25,376.09 and 14,122.47

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Solution

The fourth proportional to 18,378.12, 25,376.09 and 14,122.47 is: 19,499.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.12 : 25,376.09 = 14,122.47 : x
  2. Step 2: Convert to fraction form
    18,378.12/25,376.09 = 14,122.47/x
  3. Step 3: Cross multiply
    18,378.12x = 25,376.09 × 14,122.47
  4. Step 4: Simplify right side
    18,378.12x = 358,373,069.74
  5. Step 5: Solve for x
    x = 358,373,069.74/18,378.12
  6. Step 6: Final answer
    x = 19,499.99

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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.