Home / 30,019.58-45,034.31-12,490.64

Finding the Fourth Proportional to 30,019.58, 45,034.31 and 12,490.64

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Solution

The fourth proportional to 30,019.58, 45,034.31 and 12,490.64 is: 18,738.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,019.58 : 45,034.31 = 12,490.64 : x
  2. Step 2: Convert to fraction form
    30,019.58/45,034.31 = 12,490.64/x
  3. Step 3: Cross multiply
    30,019.58x = 45,034.31 × 12,490.64
  4. Step 4: Simplify right side
    30,019.58x = 562,507,128.69
  5. Step 5: Solve for x
    x = 562,507,128.69/30,019.58
  6. Step 6: Final answer
    x = 18,738.01

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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.