Home / 30,754.98-42,448.77-20,138.45

Finding the Fourth Proportional to 30,754.98, 42,448.77 and 20,138.45

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Solution

The fourth proportional to 30,754.98, 42,448.77 and 20,138.45 is: 27,795.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,754.98 : 42,448.77 = 20,138.45 : x
  2. Step 2: Convert to fraction form
    30,754.98/42,448.77 = 20,138.45/x
  3. Step 3: Cross multiply
    30,754.98x = 42,448.77 × 20,138.45
  4. Step 4: Simplify right side
    30,754.98x = 854,852,219.96
  5. Step 5: Solve for x
    x = 854,852,219.96/30,754.98
  6. Step 6: Final answer
    x = 27,795.57

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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.