Home / 20,140.70-30,220.98-9,055.45

Finding the Fourth Proportional to 20,140.70, 30,220.98 and 9,055.45

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Solution

The fourth proportional to 20,140.70, 30,220.98 and 9,055.45 is: 13,587.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.70 : 30,220.98 = 9,055.45 : x
  2. Step 2: Convert to fraction form
    20,140.70/30,220.98 = 9,055.45/x
  3. Step 3: Cross multiply
    20,140.70x = 30,220.98 × 9,055.45
  4. Step 4: Simplify right side
    20,140.70x = 273,664,497.79
  5. Step 5: Solve for x
    x = 273,664,497.79/20,140.70
  6. Step 6: Final answer
    x = 13,587.63

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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.