Home / 30,165.55-45,246.30-7,978.44

Finding the Fourth Proportional to 30,165.55, 45,246.30 and 7,978.44

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Solution

The fourth proportional to 30,165.55, 45,246.30 and 7,978.44 is: 11,967.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,165.55 : 45,246.30 = 7,978.44 : x
  2. Step 2: Convert to fraction form
    30,165.55/45,246.30 = 7,978.44/x
  3. Step 3: Cross multiply
    30,165.55x = 45,246.30 × 7,978.44
  4. Step 4: Simplify right side
    30,165.55x = 360,994,889.77
  5. Step 5: Solve for x
    x = 360,994,889.77/30,165.55
  6. Step 6: Final answer
    x = 11,967.12

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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.