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Finding the Fourth Proportional to 20,375.65, 30,547.02 and 7,889.30

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Solution

The fourth proportional to 20,375.65, 30,547.02 and 7,889.30 is: 11,827.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.65 : 30,547.02 = 7,889.30 : x
  2. Step 2: Convert to fraction form
    20,375.65/30,547.02 = 7,889.30/x
  3. Step 3: Cross multiply
    20,375.65x = 30,547.02 × 7,889.30
  4. Step 4: Simplify right side
    20,375.65x = 240,994,596.29
  5. Step 5: Solve for x
    x = 240,994,596.29/20,375.65
  6. Step 6: Final answer
    x = 11,827.58

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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.