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Finding the Fourth Proportional to 5,918.60, 8,877.90 and 4,075.40

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Solution

The fourth proportional to 5,918.60, 8,877.90 and 4,075.40 is: 6,113.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918.60 : 8,877.90 = 4,075.40 : x
  2. Step 2: Convert to fraction form
    5,918.60/8,877.90 = 4,075.40/x
  3. Step 3: Cross multiply
    5,918.60x = 8,877.90 × 4,075.40
  4. Step 4: Simplify right side
    5,918.60x = 36,180,993.66
  5. Step 5: Solve for x
    x = 36,180,993.66/5,918.60
  6. Step 6: Final answer
    x = 6,113.10

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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.