Home / 21,319.44-29,420.89-11,888.61

Finding the Fourth Proportional to 21,319.44, 29,420.89 and 11,888.61

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Solution

The fourth proportional to 21,319.44, 29,420.89 and 11,888.61 is: 16,406.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.44 : 29,420.89 = 11,888.61 : x
  2. Step 2: Convert to fraction form
    21,319.44/29,420.89 = 11,888.61/x
  3. Step 3: Cross multiply
    21,319.44x = 29,420.89 × 11,888.61
  4. Step 4: Simplify right side
    21,319.44x = 349,773,347.01
  5. Step 5: Solve for x
    x = 349,773,347.01/21,319.44
  6. Step 6: Final answer
    x = 16,406.31

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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.