Home / 21,055.51-31,603.11-15,491.89

Finding the Fourth Proportional to 21,055.51, 31,603.11 and 15,491.89

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Solution

The fourth proportional to 21,055.51, 31,603.11 and 15,491.89 is: 23,252.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.51 : 31,603.11 = 15,491.89 : x
  2. Step 2: Convert to fraction form
    21,055.51/31,603.11 = 15,491.89/x
  3. Step 3: Cross multiply
    21,055.51x = 31,603.11 × 15,491.89
  4. Step 4: Simplify right side
    21,055.51x = 489,591,903.78
  5. Step 5: Solve for x
    x = 489,591,903.78/21,055.51
  6. Step 6: Final answer
    x = 23,252.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.