Home / 30,440.28-45,648.90-12,918.36

Finding the Fourth Proportional to 30,440.28, 45,648.90 and 12,918.36

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Solution

The fourth proportional to 30,440.28, 45,648.90 and 12,918.36 is: 19,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,440.28 : 45,648.90 = 12,918.36 : x
  2. Step 2: Convert to fraction form
    30,440.28/45,648.90 = 12,918.36/x
  3. Step 3: Cross multiply
    30,440.28x = 45,648.90 × 12,918.36
  4. Step 4: Simplify right side
    30,440.28x = 589,708,923.80
  5. Step 5: Solve for x
    x = 589,708,923.80/30,440.28
  6. Step 6: Final answer
    x = 19,372.65

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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.