Home / 30,778.07-42,464.29-18,828.95

Finding the Fourth Proportional to 30,778.07, 42,464.29 and 18,828.95

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Solution

The fourth proportional to 30,778.07, 42,464.29 and 18,828.95 is: 25,978.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,778.07 : 42,464.29 = 18,828.95 : x
  2. Step 2: Convert to fraction form
    30,778.07/42,464.29 = 18,828.95/x
  3. Step 3: Cross multiply
    30,778.07x = 42,464.29 × 18,828.95
  4. Step 4: Simplify right side
    30,778.07x = 799,557,993.20
  5. Step 5: Solve for x
    x = 799,557,993.20/30,778.07
  6. Step 6: Final answer
    x = 25,978.17

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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.