Home / 20,510.90-28,302.60-11,558.12

Finding the Fourth Proportional to 20,510.90, 28,302.60 and 11,558.12

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Solution

The fourth proportional to 20,510.90, 28,302.60 and 11,558.12 is: 15,948.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.90 : 28,302.60 = 11,558.12 : x
  2. Step 2: Convert to fraction form
    20,510.90/28,302.60 = 11,558.12/x
  3. Step 3: Cross multiply
    20,510.90x = 28,302.60 × 11,558.12
  4. Step 4: Simplify right side
    20,510.90x = 327,124,847.11
  5. Step 5: Solve for x
    x = 327,124,847.11/20,510.90
  6. Step 6: Final answer
    x = 15,948.83

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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.