Home / 30,309.40-45,464.10-8,126.20

Finding the Fourth Proportional to 30,309.40, 45,464.10 and 8,126.20

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Solution

The fourth proportional to 30,309.40, 45,464.10 and 8,126.20 is: 12,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,309.40 : 45,464.10 = 8,126.20 : x
  2. Step 2: Convert to fraction form
    30,309.40/45,464.10 = 8,126.20/x
  3. Step 3: Cross multiply
    30,309.40x = 45,464.10 × 8,126.20
  4. Step 4: Simplify right side
    30,309.40x = 369,450,369.42
  5. Step 5: Solve for x
    x = 369,450,369.42/30,309.40
  6. Step 6: Final answer
    x = 12,189.30

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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.