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Finding the Fourth Proportional to 57,995.56, 86,990.62 and 20,555.04

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Solution

The fourth proportional to 57,995.56, 86,990.62 and 20,555.04 is: 30,831.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,995.56 : 86,990.62 = 20,555.04 : x
  2. Step 2: Convert to fraction form
    57,995.56/86,990.62 = 20,555.04/x
  3. Step 3: Cross multiply
    57,995.56x = 86,990.62 × 20,555.04
  4. Step 4: Simplify right side
    57,995.56x = 1,788,095,673.72
  5. Step 5: Solve for x
    x = 1,788,095,673.72/57,995.56
  6. Step 6: Final answer
    x = 30,831.60

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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.