Home / 30,629.10-42,272.74-18,699.36

Finding the Fourth Proportional to 30,629.10, 42,272.74 and 18,699.36

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Solution

The fourth proportional to 30,629.10, 42,272.74 and 18,699.36 is: 25,807.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,629.10 : 42,272.74 = 18,699.36 : x
  2. Step 2: Convert to fraction form
    30,629.10/42,272.74 = 18,699.36/x
  3. Step 3: Cross multiply
    30,629.10x = 42,272.74 × 18,699.36
  4. Step 4: Simplify right side
    30,629.10x = 790,473,183.45
  5. Step 5: Solve for x
    x = 790,473,183.45/30,629.10
  6. Step 6: Final answer
    x = 25,807.91

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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.