Home / 30,967.20-42,735.20-16,820.32

Finding the Fourth Proportional to 30,967.20, 42,735.20 and 16,820.32

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Solution

The fourth proportional to 30,967.20, 42,735.20 and 16,820.32 is: 23,212.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,967.20 : 42,735.20 = 16,820.32 : x
  2. Step 2: Convert to fraction form
    30,967.20/42,735.20 = 16,820.32/x
  3. Step 3: Cross multiply
    30,967.20x = 42,735.20 × 16,820.32
  4. Step 4: Simplify right side
    30,967.20x = 718,819,739.26
  5. Step 5: Solve for x
    x = 718,819,739.26/30,967.20
  6. Step 6: Final answer
    x = 23,212.29

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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.