Home / 21,319.19-29,421.39-11,887.75

Finding the Fourth Proportional to 21,319.19, 29,421.39 and 11,887.75

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Solution

The fourth proportional to 21,319.19, 29,421.39 and 11,887.75 is: 16,405.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.19 : 29,421.39 = 11,887.75 : x
  2. Step 2: Convert to fraction form
    21,319.19/29,421.39 = 11,887.75/x
  3. Step 3: Cross multiply
    21,319.19x = 29,421.39 × 11,887.75
  4. Step 4: Simplify right side
    21,319.19x = 349,754,128.97
  5. Step 5: Solve for x
    x = 349,754,128.97/21,319.19
  6. Step 6: Final answer
    x = 16,405.60

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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.