Home / 20,220.77-30,303.47-12,830.42

Finding the Fourth Proportional to 20,220.77, 30,303.47 and 12,830.42

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Solution

The fourth proportional to 20,220.77, 30,303.47 and 12,830.42 is: 19,228.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.77 : 30,303.47 = 12,830.42 : x
  2. Step 2: Convert to fraction form
    20,220.77/30,303.47 = 12,830.42/x
  3. Step 3: Cross multiply
    20,220.77x = 30,303.47 × 12,830.42
  4. Step 4: Simplify right side
    20,220.77x = 388,806,247.56
  5. Step 5: Solve for x
    x = 388,806,247.56/20,220.77
  6. Step 6: Final answer
    x = 19,228.06

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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.