Home / 13,521.59-18,668.55-12,102.80

Finding the Fourth Proportional to 13,521.59, 18,668.55 and 12,102.80

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Solution

The fourth proportional to 13,521.59, 18,668.55 and 12,102.80 is: 16,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.59 : 18,668.55 = 12,102.80 : x
  2. Step 2: Convert to fraction form
    13,521.59/18,668.55 = 12,102.80/x
  3. Step 3: Cross multiply
    13,521.59x = 18,668.55 × 12,102.80
  4. Step 4: Simplify right side
    13,521.59x = 225,941,726.94
  5. Step 5: Solve for x
    x = 225,941,726.94/13,521.59
  6. Step 6: Final answer
    x = 16,709.70

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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.