Home / 30,128.81-41,594.31-20,583.05

Finding the Fourth Proportional to 30,128.81, 41,594.31 and 20,583.05

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Solution

The fourth proportional to 30,128.81, 41,594.31 and 20,583.05 is: 28,415.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.81 : 41,594.31 = 20,583.05 : x
  2. Step 2: Convert to fraction form
    30,128.81/41,594.31 = 20,583.05/x
  3. Step 3: Cross multiply
    30,128.81x = 41,594.31 × 20,583.05
  4. Step 4: Simplify right side
    30,128.81x = 856,137,554.47
  5. Step 5: Solve for x
    x = 856,137,554.47/30,128.81
  6. Step 6: Final answer
    x = 28,415.91

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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.