Home / 30,884.34-42,619.35-18,137.28

Finding the Fourth Proportional to 30,884.34, 42,619.35 and 18,137.28

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Solution

The fourth proportional to 30,884.34, 42,619.35 and 18,137.28 is: 25,028.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,884.34 : 42,619.35 = 18,137.28 : x
  2. Step 2: Convert to fraction form
    30,884.34/42,619.35 = 18,137.28/x
  3. Step 3: Cross multiply
    30,884.34x = 42,619.35 × 18,137.28
  4. Step 4: Simplify right side
    30,884.34x = 772,999,084.37
  5. Step 5: Solve for x
    x = 772,999,084.37/30,884.34
  6. Step 6: Final answer
    x = 25,028.84

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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.