Home / 30,133.06-45,209.14-18,138.35

Finding the Fourth Proportional to 30,133.06, 45,209.14 and 18,138.35

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Solution

The fourth proportional to 30,133.06, 45,209.14 and 18,138.35 is: 27,213.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,133.06 : 45,209.14 = 18,138.35 : x
  2. Step 2: Convert to fraction form
    30,133.06/45,209.14 = 18,138.35/x
  3. Step 3: Cross multiply
    30,133.06x = 45,209.14 × 18,138.35
  4. Step 4: Simplify right side
    30,133.06x = 820,019,204.52
  5. Step 5: Solve for x
    x = 820,019,204.52/30,133.06
  6. Step 6: Final answer
    x = 27,213.27

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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.