Home / 30,306.90-45,459.60-8,120.25

Finding the Fourth Proportional to 30,306.90, 45,459.60 and 8,120.25

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Solution

The fourth proportional to 30,306.90, 45,459.60 and 8,120.25 is: 12,180.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,306.90 : 45,459.60 = 8,120.25 : x
  2. Step 2: Convert to fraction form
    30,306.90/45,459.60 = 8,120.25/x
  3. Step 3: Cross multiply
    30,306.90x = 45,459.60 × 8,120.25
  4. Step 4: Simplify right side
    30,306.90x = 369,143,316.90
  5. Step 5: Solve for x
    x = 369,143,316.90/30,306.90
  6. Step 6: Final answer
    x = 12,180.17

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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.