Home / 21,420.76-29,559.62-11,859.98

Finding the Fourth Proportional to 21,420.76, 29,559.62 and 11,859.98

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Solution

The fourth proportional to 21,420.76, 29,559.62 and 11,859.98 is: 16,366.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.76 : 29,559.62 = 11,859.98 : x
  2. Step 2: Convert to fraction form
    21,420.76/29,559.62 = 11,859.98/x
  3. Step 3: Cross multiply
    21,420.76x = 29,559.62 × 11,859.98
  4. Step 4: Simplify right side
    21,420.76x = 350,576,405.76
  5. Step 5: Solve for x
    x = 350,576,405.76/21,420.76
  6. Step 6: Final answer
    x = 16,366.20

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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.