Home / 21,319.25-29,421.36-11,889.63

Finding the Fourth Proportional to 21,319.25, 29,421.36 and 11,889.63

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Solution

The fourth proportional to 21,319.25, 29,421.36 and 11,889.63 is: 16,408.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.25 : 29,421.36 = 11,889.63 : x
  2. Step 2: Convert to fraction form
    21,319.25/29,421.36 = 11,889.63/x
  3. Step 3: Cross multiply
    21,319.25x = 29,421.36 × 11,889.63
  4. Step 4: Simplify right side
    21,319.25x = 349,809,084.50
  5. Step 5: Solve for x
    x = 349,809,084.50/21,319.25
  6. Step 6: Final answer
    x = 16,408.14

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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.