Home / 12,117.78-18,172.01-4,721.27

Finding the Fourth Proportional to 12,117.78, 18,172.01 and 4,721.27

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Solution

The fourth proportional to 12,117.78, 18,172.01 and 4,721.27 is: 7,080.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.78 : 18,172.01 = 4,721.27 : x
  2. Step 2: Convert to fraction form
    12,117.78/18,172.01 = 4,721.27/x
  3. Step 3: Cross multiply
    12,117.78x = 18,172.01 × 4,721.27
  4. Step 4: Simplify right side
    12,117.78x = 85,794,851.19
  5. Step 5: Solve for x
    x = 85,794,851.19/12,117.78
  6. Step 6: Final answer
    x = 7,080.08

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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.