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Finding the Fourth Proportional to 17,990.40, 26,978.16 and 6,300.84

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Solution

The fourth proportional to 17,990.40, 26,978.16 and 6,300.84 is: 9,448.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,990.40 : 26,978.16 = 6,300.84 : x
  2. Step 2: Convert to fraction form
    17,990.40/26,978.16 = 6,300.84/x
  3. Step 3: Cross multiply
    17,990.40x = 26,978.16 × 6,300.84
  4. Step 4: Simplify right side
    17,990.40x = 169,985,069.65
  5. Step 5: Solve for x
    x = 169,985,069.65/17,990.40
  6. Step 6: Final answer
    x = 9,448.65

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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.