Home / 20,530.09-28,329.36-11,578.96

Finding the Fourth Proportional to 20,530.09, 28,329.36 and 11,578.96

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Solution

The fourth proportional to 20,530.09, 28,329.36 and 11,578.96 is: 15,977.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.09 : 28,329.36 = 11,578.96 : x
  2. Step 2: Convert to fraction form
    20,530.09/28,329.36 = 11,578.96/x
  3. Step 3: Cross multiply
    20,530.09x = 28,329.36 × 11,578.96
  4. Step 4: Simplify right side
    20,530.09x = 328,024,526.27
  5. Step 5: Solve for x
    x = 328,024,526.27/20,530.09
  6. Step 6: Final answer
    x = 15,977.74

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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.