Home / 30,021.20-45,022.04-12,486.32

Finding the Fourth Proportional to 30,021.20, 45,022.04 and 12,486.32

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Solution

The fourth proportional to 30,021.20, 45,022.04 and 12,486.32 is: 18,725.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,021.20 : 45,022.04 = 12,486.32 : x
  2. Step 2: Convert to fraction form
    30,021.20/45,022.04 = 12,486.32/x
  3. Step 3: Cross multiply
    30,021.20x = 45,022.04 × 12,486.32
  4. Step 4: Simplify right side
    30,021.20x = 562,159,598.49
  5. Step 5: Solve for x
    x = 562,159,598.49/30,021.20
  6. Step 6: Final answer
    x = 18,725.42

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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.