Home / 30,634.80-42,280.60-18,705.04

Finding the Fourth Proportional to 30,634.80, 42,280.60 and 18,705.04

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Solution

The fourth proportional to 30,634.80, 42,280.60 and 18,705.04 is: 25,815.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,634.80 : 42,280.60 = 18,705.04 : x
  2. Step 2: Convert to fraction form
    30,634.80/42,280.60 = 18,705.04/x
  3. Step 3: Cross multiply
    30,634.80x = 42,280.60 × 18,705.04
  4. Step 4: Simplify right side
    30,634.80x = 790,860,314.22
  5. Step 5: Solve for x
    x = 790,860,314.22/30,634.80
  6. Step 6: Final answer
    x = 25,815.75

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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.