Home / 20,511.16-28,300.42-11,558.67

Finding the Fourth Proportional to 20,511.16, 28,300.42 and 11,558.67

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Solution

The fourth proportional to 20,511.16, 28,300.42 and 11,558.67 is: 15,948.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.16 : 28,300.42 = 11,558.67 : x
  2. Step 2: Convert to fraction form
    20,511.16/28,300.42 = 11,558.67/x
  3. Step 3: Cross multiply
    20,511.16x = 28,300.42 × 11,558.67
  4. Step 4: Simplify right side
    20,511.16x = 327,115,215.64
  5. Step 5: Solve for x
    x = 327,115,215.64/20,511.16
  6. Step 6: Final answer
    x = 15,948.16

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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.