Home / 18,621.79-25,672.91-12,643.07

Finding the Fourth Proportional to 18,621.79, 25,672.91 and 12,643.07

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Solution

The fourth proportional to 18,621.79, 25,672.91 and 12,643.07 is: 17,430.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,621.79 : 25,672.91 = 12,643.07 : x
  2. Step 2: Convert to fraction form
    18,621.79/25,672.91 = 12,643.07/x
  3. Step 3: Cross multiply
    18,621.79x = 25,672.91 × 12,643.07
  4. Step 4: Simplify right side
    18,621.79x = 324,584,548.27
  5. Step 5: Solve for x
    x = 324,584,548.27/18,621.79
  6. Step 6: Final answer
    x = 17,430.37

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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.