Home / 22,123.36-30,561.20-15,405.63

Finding the Fourth Proportional to 22,123.36, 30,561.20 and 15,405.63

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Solution

The fourth proportional to 22,123.36, 30,561.20 and 15,405.63 is: 21,281.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,123.36 : 30,561.20 = 15,405.63 : x
  2. Step 2: Convert to fraction form
    22,123.36/30,561.20 = 15,405.63/x
  3. Step 3: Cross multiply
    22,123.36x = 30,561.20 × 15,405.63
  4. Step 4: Simplify right side
    22,123.36x = 470,814,539.56
  5. Step 5: Solve for x
    x = 470,814,539.56/22,123.36
  6. Step 6: Final answer
    x = 21,281.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.