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Finding the Fourth Proportional to 18,762.48, 28,143.16 and 4,722.48

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Solution

The fourth proportional to 18,762.48, 28,143.16 and 4,722.48 is: 7,083.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.48 : 28,143.16 = 4,722.48 : x
  2. Step 2: Convert to fraction form
    18,762.48/28,143.16 = 4,722.48/x
  3. Step 3: Cross multiply
    18,762.48x = 28,143.16 × 4,722.48
  4. Step 4: Simplify right side
    18,762.48x = 132,905,510.24
  5. Step 5: Solve for x
    x = 132,905,510.24/18,762.48
  6. Step 6: Final answer
    x = 7,083.58

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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.