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Finding the Fourth Proportional to 30,647.20, 45,913.20 and 15,805.60

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Solution

The fourth proportional to 30,647.20, 45,913.20 and 15,805.60 is: 23,678.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,647.20 : 45,913.20 = 15,805.60 : x
  2. Step 2: Convert to fraction form
    30,647.20/45,913.20 = 15,805.60/x
  3. Step 3: Cross multiply
    30,647.20x = 45,913.20 × 15,805.60
  4. Step 4: Simplify right side
    30,647.20x = 725,685,673.92
  5. Step 5: Solve for x
    x = 725,685,673.92/30,647.20
  6. Step 6: Final answer
    x = 23,678.69

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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.