Home / 21,317.30-31,985.16-11,445.05

Finding the Fourth Proportional to 21,317.30, 31,985.16 and 11,445.05

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Solution

The fourth proportional to 21,317.30, 31,985.16 and 11,445.05 is: 17,172.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.30 : 31,985.16 = 11,445.05 : x
  2. Step 2: Convert to fraction form
    21,317.30/31,985.16 = 11,445.05/x
  3. Step 3: Cross multiply
    21,317.30x = 31,985.16 × 11,445.05
  4. Step 4: Simplify right side
    21,317.30x = 366,071,755.46
  5. Step 5: Solve for x
    x = 366,071,755.46/21,317.30
  6. Step 6: Final answer
    x = 17,172.52

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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.