Home / 20,859.13-31,292.78-9,172.31

Finding the Fourth Proportional to 20,859.13, 31,292.78 and 9,172.31

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Solution

The fourth proportional to 20,859.13, 31,292.78 and 9,172.31 is: 13,760.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.13 : 31,292.78 = 9,172.31 : x
  2. Step 2: Convert to fraction form
    20,859.13/31,292.78 = 9,172.31/x
  3. Step 3: Cross multiply
    20,859.13x = 31,292.78 × 9,172.31
  4. Step 4: Simplify right side
    20,859.13x = 287,027,111.29
  5. Step 5: Solve for x
    x = 287,027,111.29/20,859.13
  6. Step 6: Final answer
    x = 13,760.26

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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.