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Finding the Fourth Proportional to 18,723.52, 28,085.44 and 8,334.40

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Solution

The fourth proportional to 18,723.52, 28,085.44 and 8,334.40 is: 12,501.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.52 : 28,085.44 = 8,334.40 : x
  2. Step 2: Convert to fraction form
    18,723.52/28,085.44 = 8,334.40/x
  3. Step 3: Cross multiply
    18,723.52x = 28,085.44 × 8,334.40
  4. Step 4: Simplify right side
    18,723.52x = 234,075,291.14
  5. Step 5: Solve for x
    x = 234,075,291.14/18,723.52
  6. Step 6: Final answer
    x = 12,501.67

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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.