Home / 20,709.48-28,580.29-15,595.85

Finding the Fourth Proportional to 20,709.48, 28,580.29 and 15,595.85

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Solution

The fourth proportional to 20,709.48, 28,580.29 and 15,595.85 is: 21,523.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.48 : 28,580.29 = 15,595.85 : x
  2. Step 2: Convert to fraction form
    20,709.48/28,580.29 = 15,595.85/x
  3. Step 3: Cross multiply
    20,709.48x = 28,580.29 × 15,595.85
  4. Step 4: Simplify right side
    20,709.48x = 445,733,772.90
  5. Step 5: Solve for x
    x = 445,733,772.90/20,709.48
  6. Step 6: Final answer
    x = 21,523.18

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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.