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Finding the Fourth Proportional to 30,659.43, 45,981.86 and 8,472.32

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Solution

The fourth proportional to 30,659.43, 45,981.86 and 8,472.32 is: 12,706.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,659.43 : 45,981.86 = 8,472.32 : x
  2. Step 2: Convert to fraction form
    30,659.43/45,981.86 = 8,472.32/x
  3. Step 3: Cross multiply
    30,659.43x = 45,981.86 × 8,472.32
  4. Step 4: Simplify right side
    30,659.43x = 389,572,759.84
  5. Step 5: Solve for x
    x = 389,572,759.84/30,659.43
  6. Step 6: Final answer
    x = 12,706.46

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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.