Home / 20,586.66-28,409.59-11,155.22

Finding the Fourth Proportional to 20,586.66, 28,409.59 and 11,155.22

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Solution

The fourth proportional to 20,586.66, 28,409.59 and 11,155.22 is: 15,394.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.66 : 28,409.59 = 11,155.22 : x
  2. Step 2: Convert to fraction form
    20,586.66/28,409.59 = 11,155.22/x
  3. Step 3: Cross multiply
    20,586.66x = 28,409.59 × 11,155.22
  4. Step 4: Simplify right side
    20,586.66x = 316,915,142.24
  5. Step 5: Solve for x
    x = 316,915,142.24/20,586.66
  6. Step 6: Final answer
    x = 15,394.20

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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.