Home / 20,586.69-28,409.72-11,155.23

Finding the Fourth Proportional to 20,586.69, 28,409.72 and 11,155.23

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Solution

The fourth proportional to 20,586.69, 28,409.72 and 11,155.23 is: 15,394.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.69 : 28,409.72 = 11,155.23 : x
  2. Step 2: Convert to fraction form
    20,586.69/28,409.72 = 11,155.23/x
  3. Step 3: Cross multiply
    20,586.69x = 28,409.72 × 11,155.23
  4. Step 4: Simplify right side
    20,586.69x = 316,916,905.06
  5. Step 5: Solve for x
    x = 316,916,905.06/20,586.69
  6. Step 6: Final answer
    x = 15,394.26

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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.