Home / 20,530.64-28,331.92-11,578.16

Finding the Fourth Proportional to 20,530.64, 28,331.92 and 11,578.16

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Solution

The fourth proportional to 20,530.64, 28,331.92 and 11,578.16 is: 15,977.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.64 : 28,331.92 = 11,578.16 : x
  2. Step 2: Convert to fraction form
    20,530.64/28,331.92 = 11,578.16/x
  3. Step 3: Cross multiply
    20,530.64x = 28,331.92 × 11,578.16
  4. Step 4: Simplify right side
    20,530.64x = 328,031,588.17
  5. Step 5: Solve for x
    x = 328,031,588.17/20,530.64
  6. Step 6: Final answer
    x = 15,977.66

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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.