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Finding the Fourth Proportional to 30,632.88, 45,929.28 and 12,871.92

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Solution

The fourth proportional to 30,632.88, 45,929.28 and 12,871.92 is: 19,299.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,632.88 : 45,929.28 = 12,871.92 : x
  2. Step 2: Convert to fraction form
    30,632.88/45,929.28 = 12,871.92/x
  3. Step 3: Cross multiply
    30,632.88x = 45,929.28 × 12,871.92
  4. Step 4: Simplify right side
    30,632.88x = 591,198,017.82
  5. Step 5: Solve for x
    x = 591,198,017.82/30,632.88
  6. Step 6: Final answer
    x = 19,299.46

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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.