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Finding the Fourth Proportional to 20,378.88, 30,547.84 and 7,895.68

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Solution

The fourth proportional to 20,378.88, 30,547.84 and 7,895.68 is: 11,835.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.88 : 30,547.84 = 7,895.68 : x
  2. Step 2: Convert to fraction form
    20,378.88/30,547.84 = 7,895.68/x
  3. Step 3: Cross multiply
    20,378.88x = 30,547.84 × 7,895.68
  4. Step 4: Simplify right side
    20,378.88x = 241,195,969.33
  5. Step 5: Solve for x
    x = 241,195,969.33/20,378.88
  6. Step 6: Final answer
    x = 11,835.59

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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.