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Finding the Fourth Proportional to 8,728.47, 13,075.65 and 6,977.16

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Solution

The fourth proportional to 8,728.47, 13,075.65 and 6,977.16 is: 10,452.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.47 : 13,075.65 = 6,977.16 : x
  2. Step 2: Convert to fraction form
    8,728.47/13,075.65 = 6,977.16/x
  3. Step 3: Cross multiply
    8,728.47x = 13,075.65 × 6,977.16
  4. Step 4: Simplify right side
    8,728.47x = 91,230,902.15
  5. Step 5: Solve for x
    x = 91,230,902.15/8,728.47
  6. Step 6: Final answer
    x = 10,452.11

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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.