Home / 30,642.19-42,302.37-20,623.30

Finding the Fourth Proportional to 30,642.19, 42,302.37 and 20,623.30

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Solution

The fourth proportional to 30,642.19, 42,302.37 and 20,623.30 is: 28,471.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,642.19 : 42,302.37 = 20,623.30 : x
  2. Step 2: Convert to fraction form
    30,642.19/42,302.37 = 20,623.30/x
  3. Step 3: Cross multiply
    30,642.19x = 42,302.37 × 20,623.30
  4. Step 4: Simplify right side
    30,642.19x = 872,414,467.22
  5. Step 5: Solve for x
    x = 872,414,467.22/30,642.19
  6. Step 6: Final answer
    x = 28,471.02

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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.