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Finding the Fourth Proportional to 18,575.76, 27,870.75 and 11,185.50

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Solution

The fourth proportional to 18,575.76, 27,870.75 and 11,185.50 is: 16,782.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,575.76 : 27,870.75 = 11,185.50 : x
  2. Step 2: Convert to fraction form
    18,575.76/27,870.75 = 11,185.50/x
  3. Step 3: Cross multiply
    18,575.76x = 27,870.75 × 11,185.50
  4. Step 4: Simplify right side
    18,575.76x = 311,748,274.13
  5. Step 5: Solve for x
    x = 311,748,274.13/18,575.76
  6. Step 6: Final answer
    x = 16,782.53

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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.