Home / 54,254.40-81,373.80-20,990.16

Finding the Fourth Proportional to 54,254.40, 81,373.80 and 20,990.16

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Solution

The fourth proportional to 54,254.40, 81,373.80 and 20,990.16 is: 31,482.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,254.40 : 81,373.80 = 20,990.16 : x
  2. Step 2: Convert to fraction form
    54,254.40/81,373.80 = 20,990.16/x
  3. Step 3: Cross multiply
    54,254.40x = 81,373.80 × 20,990.16
  4. Step 4: Simplify right side
    54,254.40x = 1,708,049,081.81
  5. Step 5: Solve for x
    x = 1,708,049,081.81/54,254.40
  6. Step 6: Final answer
    x = 31,482.22

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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.