Home / 21,419.70-29,559.18-11,988.26

Finding the Fourth Proportional to 21,419.70, 29,559.18 and 11,988.26

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Solution

The fourth proportional to 21,419.70, 29,559.18 and 11,988.26 is: 16,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.70 : 29,559.18 = 11,988.26 : x
  2. Step 2: Convert to fraction form
    21,419.70/29,559.18 = 11,988.26/x
  3. Step 3: Cross multiply
    21,419.70x = 29,559.18 × 11,988.26
  4. Step 4: Simplify right side
    21,419.70x = 354,363,075.29
  5. Step 5: Solve for x
    x = 354,363,075.29/21,419.70
  6. Step 6: Final answer
    x = 16,543.80

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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.