Home / 20,075.89-30,111.28-5,285.95

Finding the Fourth Proportional to 20,075.89, 30,111.28 and 5,285.95

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Solution

The fourth proportional to 20,075.89, 30,111.28 and 5,285.95 is: 7,928.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.89 : 30,111.28 = 5,285.95 : x
  2. Step 2: Convert to fraction form
    20,075.89/30,111.28 = 5,285.95/x
  3. Step 3: Cross multiply
    20,075.89x = 30,111.28 × 5,285.95
  4. Step 4: Simplify right side
    20,075.89x = 159,166,720.52
  5. Step 5: Solve for x
    x = 159,166,720.52/20,075.89
  6. Step 6: Final answer
    x = 7,928.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.