Home / 30,638.57-42,297.35-20,619.68

Finding the Fourth Proportional to 30,638.57, 42,297.35 and 20,619.68

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Solution

The fourth proportional to 30,638.57, 42,297.35 and 20,619.68 is: 28,466.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,638.57 : 42,297.35 = 20,619.68 : x
  2. Step 2: Convert to fraction form
    30,638.57/42,297.35 = 20,619.68/x
  3. Step 3: Cross multiply
    30,638.57x = 42,297.35 × 20,619.68
  4. Step 4: Simplify right side
    30,638.57x = 872,157,507.26
  5. Step 5: Solve for x
    x = 872,157,507.26/30,638.57
  6. Step 6: Final answer
    x = 28,466.00

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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.