Home / 21,428.51-29,570.69-11,868.02

Finding the Fourth Proportional to 21,428.51, 29,570.69 and 11,868.02

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Solution

The fourth proportional to 21,428.51, 29,570.69 and 11,868.02 is: 16,377.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.51 : 29,570.69 = 11,868.02 : x
  2. Step 2: Convert to fraction form
    21,428.51/29,570.69 = 11,868.02/x
  3. Step 3: Cross multiply
    21,428.51x = 29,570.69 × 11,868.02
  4. Step 4: Simplify right side
    21,428.51x = 350,945,466.41
  5. Step 5: Solve for x
    x = 350,945,466.41/21,428.51
  6. Step 6: Final answer
    x = 16,377.50

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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.