Home / 30,219.04-45,282.38-12,679.30

Finding the Fourth Proportional to 30,219.04, 45,282.38 and 12,679.30

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Solution

The fourth proportional to 30,219.04, 45,282.38 and 12,679.30 is: 18,999.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,219.04 : 45,282.38 = 12,679.30 : x
  2. Step 2: Convert to fraction form
    30,219.04/45,282.38 = 12,679.30/x
  3. Step 3: Cross multiply
    30,219.04x = 45,282.38 × 12,679.30
  4. Step 4: Simplify right side
    30,219.04x = 574,148,654.32
  5. Step 5: Solve for x
    x = 574,148,654.32/30,219.04
  6. Step 6: Final answer
    x = 18,999.57

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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.