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Finding the Fourth Proportional to 7,075.74, 9,768.18 and 4,989.18

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Solution

The fourth proportional to 7,075.74, 9,768.18 and 4,989.18 is: 6,887.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,075.74 : 9,768.18 = 4,989.18 : x
  2. Step 2: Convert to fraction form
    7,075.74/9,768.18 = 4,989.18/x
  3. Step 3: Cross multiply
    7,075.74x = 9,768.18 × 4,989.18
  4. Step 4: Simplify right side
    7,075.74x = 48,735,208.29
  5. Step 5: Solve for x
    x = 48,735,208.29/7,075.74
  6. Step 6: Final answer
    x = 6,887.65

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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.