Home / 21,172.90-31,765.15-17,214.31

Finding the Fourth Proportional to 21,172.90, 31,765.15 and 17,214.31

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Solution

The fourth proportional to 21,172.90, 31,765.15 and 17,214.31 is: 25,826.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.90 : 31,765.15 = 17,214.31 : x
  2. Step 2: Convert to fraction form
    21,172.90/31,765.15 = 17,214.31/x
  3. Step 3: Cross multiply
    21,172.90x = 31,765.15 × 17,214.31
  4. Step 4: Simplify right side
    21,172.90x = 546,814,980.47
  5. Step 5: Solve for x
    x = 546,814,980.47/21,172.90
  6. Step 6: Final answer
    x = 25,826.18

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1.5x scale

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.