Home / 21,317.80-31,985.90-11,445.54

Finding the Fourth Proportional to 21,317.80, 31,985.90 and 11,445.54

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Solution

The fourth proportional to 21,317.80, 31,985.90 and 11,445.54 is: 17,173.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.80 : 31,985.90 = 11,445.54 : x
  2. Step 2: Convert to fraction form
    21,317.80/31,985.90 = 11,445.54/x
  3. Step 3: Cross multiply
    21,317.80x = 31,985.90 × 11,445.54
  4. Step 4: Simplify right side
    21,317.80x = 366,095,897.89
  5. Step 5: Solve for x
    x = 366,095,897.89/21,317.80
  6. Step 6: Final answer
    x = 17,173.25

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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.