Home / 30,167.55-45,249.30-7,980.45

Finding the Fourth Proportional to 30,167.55, 45,249.30 and 7,980.45

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Solution

The fourth proportional to 30,167.55, 45,249.30 and 7,980.45 is: 11,970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,167.55 : 45,249.30 = 7,980.45 : x
  2. Step 2: Convert to fraction form
    30,167.55/45,249.30 = 7,980.45/x
  3. Step 3: Cross multiply
    30,167.55x = 45,249.30 × 7,980.45
  4. Step 4: Simplify right side
    30,167.55x = 361,109,776.19
  5. Step 5: Solve for x
    x = 361,109,776.19/30,167.55
  6. Step 6: Final answer
    x = 11,970.14

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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.