Home / 13,439.45-18,549.51-8,715.53

Finding the Fourth Proportional to 13,439.45, 18,549.51 and 8,715.53

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Solution

The fourth proportional to 13,439.45, 18,549.51 and 8,715.53 is: 12,029.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.45 : 18,549.51 = 8,715.53 : x
  2. Step 2: Convert to fraction form
    13,439.45/18,549.51 = 8,715.53/x
  3. Step 3: Cross multiply
    13,439.45x = 18,549.51 × 8,715.53
  4. Step 4: Simplify right side
    13,439.45x = 161,668,824.58
  5. Step 5: Solve for x
    x = 161,668,824.58/13,439.45
  6. Step 6: Final answer
    x = 12,029.42

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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.