Home / 30,161.40-45,263.70-12,643.80

Finding the Fourth Proportional to 30,161.40, 45,263.70 and 12,643.80

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Solution

The fourth proportional to 30,161.40, 45,263.70 and 12,643.80 is: 18,974.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,161.40 : 45,263.70 = 12,643.80 : x
  2. Step 2: Convert to fraction form
    30,161.40/45,263.70 = 12,643.80/x
  3. Step 3: Cross multiply
    30,161.40x = 45,263.70 × 12,643.80
  4. Step 4: Simplify right side
    30,161.40x = 572,305,170.06
  5. Step 5: Solve for x
    x = 572,305,170.06/30,161.40
  6. Step 6: Final answer
    x = 18,974.75

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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.