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Finding the Fourth Proportional to 18,735.70, 28,020.93 and 16,670.20

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Solution

The fourth proportional to 18,735.70, 28,020.93 and 16,670.20 is: 24,931.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.70 : 28,020.93 = 16,670.20 : x
  2. Step 2: Convert to fraction form
    18,735.70/28,020.93 = 16,670.20/x
  3. Step 3: Cross multiply
    18,735.70x = 28,020.93 × 16,670.20
  4. Step 4: Simplify right side
    18,735.70x = 467,114,507.29
  5. Step 5: Solve for x
    x = 467,114,507.29/18,735.70
  6. Step 6: Final answer
    x = 24,931.79

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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.