Home / 20,679.11-28,528.91-13,506.59

Finding the Fourth Proportional to 20,679.11, 28,528.91 and 13,506.59

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Solution

The fourth proportional to 20,679.11, 28,528.91 and 13,506.59 is: 18,633.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.11 : 28,528.91 = 13,506.59 : x
  2. Step 2: Convert to fraction form
    20,679.11/28,528.91 = 13,506.59/x
  3. Step 3: Cross multiply
    20,679.11x = 28,528.91 × 13,506.59
  4. Step 4: Simplify right side
    20,679.11x = 385,328,080.34
  5. Step 5: Solve for x
    x = 385,328,080.34/20,679.11
  6. Step 6: Final answer
    x = 18,633.69

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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.