Home / 30,539.76-42,144.90-18,603.15

Finding the Fourth Proportional to 30,539.76, 42,144.90 and 18,603.15

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Solution

The fourth proportional to 30,539.76, 42,144.90 and 18,603.15 is: 25,672.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,539.76 : 42,144.90 = 18,603.15 : x
  2. Step 2: Convert to fraction form
    30,539.76/42,144.90 = 18,603.15/x
  3. Step 3: Cross multiply
    30,539.76x = 42,144.90 × 18,603.15
  4. Step 4: Simplify right side
    30,539.76x = 784,027,896.44
  5. Step 5: Solve for x
    x = 784,027,896.44/30,539.76
  6. Step 6: Final answer
    x = 25,672.37

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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.