Home / 21,155.26-31,724.69-11,289.16

Finding the Fourth Proportional to 21,155.26, 31,724.69 and 11,289.16

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Solution

The fourth proportional to 21,155.26, 31,724.69 and 11,289.16 is: 16,929.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.26 : 31,724.69 = 11,289.16 : x
  2. Step 2: Convert to fraction form
    21,155.26/31,724.69 = 11,289.16/x
  3. Step 3: Cross multiply
    21,155.26x = 31,724.69 × 11,289.16
  4. Step 4: Simplify right side
    21,155.26x = 358,145,050.27
  5. Step 5: Solve for x
    x = 358,145,050.27/21,155.26
  6. Step 6: Final answer
    x = 16,929.36

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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.