Home / 31,743.36-43,823.16-20,988.72

Finding the Fourth Proportional to 31,743.36, 43,823.16 and 20,988.72

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Solution

The fourth proportional to 31,743.36, 43,823.16 and 20,988.72 is: 28,975.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,743.36 : 43,823.16 = 20,988.72 : x
  2. Step 2: Convert to fraction form
    31,743.36/43,823.16 = 20,988.72/x
  3. Step 3: Cross multiply
    31,743.36x = 43,823.16 × 20,988.72
  4. Step 4: Simplify right side
    31,743.36x = 919,792,034.76
  5. Step 5: Solve for x
    x = 919,792,034.76/31,743.36
  6. Step 6: Final answer
    x = 28,975.89

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1.5x scale

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.