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Finding the Fourth Proportional to 30,447.72, 45,660.65 and 12,911.63

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Solution

The fourth proportional to 30,447.72, 45,660.65 and 12,911.63 is: 19,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,447.72 : 45,660.65 = 12,911.63 : x
  2. Step 2: Convert to fraction form
    30,447.72/45,660.65 = 12,911.63/x
  3. Step 3: Cross multiply
    30,447.72x = 45,660.65 × 12,911.63
  4. Step 4: Simplify right side
    30,447.72x = 589,553,125.50
  5. Step 5: Solve for x
    x = 589,553,125.50/30,447.72
  6. Step 6: Final answer
    x = 19,362.80

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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.