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Finding the Fourth Proportional to 17,987.40, 26,978.67 and 4,840.56

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Solution

The fourth proportional to 17,987.40, 26,978.67 and 4,840.56 is: 7,260.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,987.40 : 26,978.67 = 4,840.56 : x
  2. Step 2: Convert to fraction form
    17,987.40/26,978.67 = 4,840.56/x
  3. Step 3: Cross multiply
    17,987.40x = 26,978.67 × 4,840.56
  4. Step 4: Simplify right side
    17,987.40x = 130,591,870.86
  5. Step 5: Solve for x
    x = 130,591,870.86/17,987.40
  6. Step 6: Final answer
    x = 7,260.19

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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.