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Finding the Fourth Proportional to 27,987.21, 41,980.32 and 6,927.21

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Solution

The fourth proportional to 27,987.21, 41,980.32 and 6,927.21 is: 10,390.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.21 : 41,980.32 = 6,927.21 : x
  2. Step 2: Convert to fraction form
    27,987.21/41,980.32 = 6,927.21/x
  3. Step 3: Cross multiply
    27,987.21x = 41,980.32 × 6,927.21
  4. Step 4: Simplify right side
    27,987.21x = 290,806,492.51
  5. Step 5: Solve for x
    x = 290,806,492.51/27,987.21
  6. Step 6: Final answer
    x = 10,390.69

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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.