Home / 31,300.16-43,170.64-21,740.04

Finding the Fourth Proportional to 31,300.16, 43,170.64 and 21,740.04

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Solution

The fourth proportional to 31,300.16, 43,170.64 and 21,740.04 is: 29,984.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,300.16 : 43,170.64 = 21,740.04 : x
  2. Step 2: Convert to fraction form
    31,300.16/43,170.64 = 21,740.04/x
  3. Step 3: Cross multiply
    31,300.16x = 43,170.64 × 21,740.04
  4. Step 4: Simplify right side
    31,300.16x = 938,531,386.08
  5. Step 5: Solve for x
    x = 938,531,386.08/31,300.16
  6. Step 6: Final answer
    x = 29,984.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.