Home / 31,740.09-43,778.57-20,972.49

Finding the Fourth Proportional to 31,740.09, 43,778.57 and 20,972.49

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Solution

The fourth proportional to 31,740.09, 43,778.57 and 20,972.49 is: 28,927.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,740.09 : 43,778.57 = 20,972.49 : x
  2. Step 2: Convert to fraction form
    31,740.09/43,778.57 = 20,972.49/x
  3. Step 3: Cross multiply
    31,740.09x = 43,778.57 × 20,972.49
  4. Step 4: Simplify right side
    31,740.09x = 918,145,621.54
  5. Step 5: Solve for x
    x = 918,145,621.54/31,740.09
  6. Step 6: Final answer
    x = 28,927.00

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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.