Home / 30,219.40-45,329.10-18,539.20

Finding the Fourth Proportional to 30,219.40, 45,329.10 and 18,539.20

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Solution

The fourth proportional to 30,219.40, 45,329.10 and 18,539.20 is: 27,808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,219.40 : 45,329.10 = 18,539.20 : x
  2. Step 2: Convert to fraction form
    30,219.40/45,329.10 = 18,539.20/x
  3. Step 3: Cross multiply
    30,219.40x = 45,329.10 × 18,539.20
  4. Step 4: Simplify right side
    30,219.40x = 840,365,250.72
  5. Step 5: Solve for x
    x = 840,365,250.72/30,219.40
  6. Step 6: Final answer
    x = 27,808.80

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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.