Home / 13,423.79-18,521.88-8,118.49

Finding the Fourth Proportional to 13,423.79, 18,521.88 and 8,118.49

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Solution

The fourth proportional to 13,423.79, 18,521.88 and 8,118.49 is: 11,201.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.79 : 18,521.88 = 8,118.49 : x
  2. Step 2: Convert to fraction form
    13,423.79/18,521.88 = 8,118.49/x
  3. Step 3: Cross multiply
    13,423.79x = 18,521.88 × 8,118.49
  4. Step 4: Simplify right side
    13,423.79x = 150,369,697.56
  5. Step 5: Solve for x
    x = 150,369,697.56/13,423.79
  6. Step 6: Final answer
    x = 11,201.74

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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.