Home / 30,960.84-42,736.86-18,385.50

Finding the Fourth Proportional to 30,960.84, 42,736.86 and 18,385.50

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Solution

The fourth proportional to 30,960.84, 42,736.86 and 18,385.50 is: 25,378.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.84 : 42,736.86 = 18,385.50 : x
  2. Step 2: Convert to fraction form
    30,960.84/42,736.86 = 18,385.50/x
  3. Step 3: Cross multiply
    30,960.84x = 42,736.86 × 18,385.50
  4. Step 4: Simplify right side
    30,960.84x = 785,738,539.53
  5. Step 5: Solve for x
    x = 785,738,539.53/30,960.84
  6. Step 6: Final answer
    x = 25,378.46

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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.