Home / 51,990.42-77,984.94-12,547.35

Finding the Fourth Proportional to 51,990.42, 77,984.94 and 12,547.35

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Solution

The fourth proportional to 51,990.42, 77,984.94 and 12,547.35 is: 18,820.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,990.42 : 77,984.94 = 12,547.35 : x
  2. Step 2: Convert to fraction form
    51,990.42/77,984.94 = 12,547.35/x
  3. Step 3: Cross multiply
    51,990.42x = 77,984.94 × 12,547.35
  4. Step 4: Simplify right side
    51,990.42x = 978,504,336.91
  5. Step 5: Solve for x
    x = 978,504,336.91/51,990.42
  6. Step 6: Final answer
    x = 18,820.86

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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.