Home / 30,400.80-45,576.90-12,856.20

Finding the Fourth Proportional to 30,400.80, 45,576.90 and 12,856.20

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Solution

The fourth proportional to 30,400.80, 45,576.90 and 12,856.20 is: 19,274.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,400.80 : 45,576.90 = 12,856.20 : x
  2. Step 2: Convert to fraction form
    30,400.80/45,576.90 = 12,856.20/x
  3. Step 3: Cross multiply
    30,400.80x = 45,576.90 × 12,856.20
  4. Step 4: Simplify right side
    30,400.80x = 585,945,741.78
  5. Step 5: Solve for x
    x = 585,945,741.78/30,400.80
  6. Step 6: Final answer
    x = 19,274.02

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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.