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Finding the Fourth Proportional to 18,865.99, 28,302.54 and 9,005.98

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Solution

The fourth proportional to 18,865.99, 28,302.54 and 9,005.98 is: 13,510.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.99 : 28,302.54 = 9,005.98 : x
  2. Step 2: Convert to fraction form
    18,865.99/28,302.54 = 9,005.98/x
  3. Step 3: Cross multiply
    18,865.99x = 28,302.54 × 9,005.98
  4. Step 4: Simplify right side
    18,865.99x = 254,892,109.19
  5. Step 5: Solve for x
    x = 254,892,109.19/18,865.99
  6. Step 6: Final answer
    x = 13,510.67

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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.