Home / 30,961.84-42,738.24-18,386.50

Finding the Fourth Proportional to 30,961.84, 42,738.24 and 18,386.50

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Solution

The fourth proportional to 30,961.84, 42,738.24 and 18,386.50 is: 25,379.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,961.84 : 42,738.24 = 18,386.50 : x
  2. Step 2: Convert to fraction form
    30,961.84/42,738.24 = 18,386.50/x
  3. Step 3: Cross multiply
    30,961.84x = 42,738.24 × 18,386.50
  4. Step 4: Simplify right side
    30,961.84x = 785,806,649.76
  5. Step 5: Solve for x
    x = 785,806,649.76/30,961.84
  6. Step 6: Final answer
    x = 25,379.84

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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.