Home / 21,391.55-29,518.99-11,831.19

Finding the Fourth Proportional to 21,391.55, 29,518.99 and 11,831.19

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Solution

The fourth proportional to 21,391.55, 29,518.99 and 11,831.19 is: 16,326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.55 : 29,518.99 = 11,831.19 : x
  2. Step 2: Convert to fraction form
    21,391.55/29,518.99 = 11,831.19/x
  3. Step 3: Cross multiply
    21,391.55x = 29,518.99 × 11,831.19
  4. Step 4: Simplify right side
    21,391.55x = 349,244,779.30
  5. Step 5: Solve for x
    x = 349,244,779.30/21,391.55
  6. Step 6: Final answer
    x = 16,326.30

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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.