Home / 30,449.90-42,018.54-18,511.58

Finding the Fourth Proportional to 30,449.90, 42,018.54 and 18,511.58

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Solution

The fourth proportional to 30,449.90, 42,018.54 and 18,511.58 is: 25,544.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,449.90 : 42,018.54 = 18,511.58 : x
  2. Step 2: Convert to fraction form
    30,449.90/42,018.54 = 18,511.58/x
  3. Step 3: Cross multiply
    30,449.90x = 42,018.54 × 18,511.58
  4. Step 4: Simplify right side
    30,449.90x = 777,829,564.69
  5. Step 5: Solve for x
    x = 777,829,564.69/30,449.90
  6. Step 6: Final answer
    x = 25,544.57

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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.