Home / 20,520.21-28,317.89-11,088.77

Finding the Fourth Proportional to 20,520.21, 28,317.89 and 11,088.77

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Solution

The fourth proportional to 20,520.21, 28,317.89 and 11,088.77 is: 15,302.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.21 : 28,317.89 = 11,088.77 : x
  2. Step 2: Convert to fraction form
    20,520.21/28,317.89 = 11,088.77/x
  3. Step 3: Cross multiply
    20,520.21x = 28,317.89 × 11,088.77
  4. Step 4: Simplify right side
    20,520.21x = 314,010,678.57
  5. Step 5: Solve for x
    x = 314,010,678.57/20,520.21
  6. Step 6: Final answer
    x = 15,302.51

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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.