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Finding the Fourth Proportional to 7,918.55, 11,878.13 and 2,988.08

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Solution

The fourth proportional to 7,918.55, 11,878.13 and 2,988.08 is: 4,482.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,918.55 : 11,878.13 = 2,988.08 : x
  2. Step 2: Convert to fraction form
    7,918.55/11,878.13 = 2,988.08/x
  3. Step 3: Cross multiply
    7,918.55x = 11,878.13 × 2,988.08
  4. Step 4: Simplify right side
    7,918.55x = 35,492,802.69
  5. Step 5: Solve for x
    x = 35,492,802.69/7,918.55
  6. Step 6: Final answer
    x = 4,482.24

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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.