Home / 30,868.76-42,599.09-16,721.60

Finding the Fourth Proportional to 30,868.76, 42,599.09 and 16,721.60

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Solution

The fourth proportional to 30,868.76, 42,599.09 and 16,721.60 is: 23,075.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,868.76 : 42,599.09 = 16,721.60 : x
  2. Step 2: Convert to fraction form
    30,868.76/42,599.09 = 16,721.60/x
  3. Step 3: Cross multiply
    30,868.76x = 42,599.09 × 16,721.60
  4. Step 4: Simplify right side
    30,868.76x = 712,324,772.15
  5. Step 5: Solve for x
    x = 712,324,772.15/30,868.76
  6. Step 6: Final answer
    x = 23,075.91

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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.