Home / 31,121.86-46,690.08-17,978.02

Finding the Fourth Proportional to 31,121.86, 46,690.08 and 17,978.02

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Solution

The fourth proportional to 31,121.86, 46,690.08 and 17,978.02 is: 26,971.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.86 : 46,690.08 = 17,978.02 : x
  2. Step 2: Convert to fraction form
    31,121.86/46,690.08 = 17,978.02/x
  3. Step 3: Cross multiply
    31,121.86x = 46,690.08 × 17,978.02
  4. Step 4: Simplify right side
    31,121.86x = 839,395,192.04
  5. Step 5: Solve for x
    x = 839,395,192.04/31,121.86
  6. Step 6: Final answer
    x = 26,971.24

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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.