Home / 30,745.17-42,420.51-18,804.15

Finding the Fourth Proportional to 30,745.17, 42,420.51 and 18,804.15

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Solution

The fourth proportional to 30,745.17, 42,420.51 and 18,804.15 is: 25,944.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,745.17 : 42,420.51 = 18,804.15 : x
  2. Step 2: Convert to fraction form
    30,745.17/42,420.51 = 18,804.15/x
  3. Step 3: Cross multiply
    30,745.17x = 42,420.51 × 18,804.15
  4. Step 4: Simplify right side
    30,745.17x = 797,681,633.12
  5. Step 5: Solve for x
    x = 797,681,633.12/30,745.17
  6. Step 6: Final answer
    x = 25,944.94

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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.