Home / 13,790.76-20,656.95-11,445.19

Finding the Fourth Proportional to 13,790.76, 20,656.95 and 11,445.19

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Solution

The fourth proportional to 13,790.76, 20,656.95 and 11,445.19 is: 17,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.76 : 20,656.95 = 11,445.19 : x
  2. Step 2: Convert to fraction form
    13,790.76/20,656.95 = 11,445.19/x
  3. Step 3: Cross multiply
    13,790.76x = 20,656.95 × 11,445.19
  4. Step 4: Simplify right side
    13,790.76x = 236,422,717.57
  5. Step 5: Solve for x
    x = 236,422,717.57/13,790.76
  6. Step 6: Final answer
    x = 17,143.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.