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Finding the Fourth Proportional to 20,075.66, 30,117.53 and 6,928.54

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Solution

The fourth proportional to 20,075.66, 30,117.53 and 6,928.54 is: 10,394.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.66 : 30,117.53 = 6,928.54 : x
  2. Step 2: Convert to fraction form
    20,075.66/30,117.53 = 6,928.54/x
  3. Step 3: Cross multiply
    20,075.66x = 30,117.53 × 6,928.54
  4. Step 4: Simplify right side
    20,075.66x = 208,670,511.31
  5. Step 5: Solve for x
    x = 208,670,511.31/20,075.66
  6. Step 6: Final answer
    x = 10,394.20

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1.5x scale

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.