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Finding the Fourth Proportional to 18,752.64, 28,128.99 and 5,614.26

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Solution

The fourth proportional to 18,752.64, 28,128.99 and 5,614.26 is: 8,421.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.64 : 28,128.99 = 5,614.26 : x
  2. Step 2: Convert to fraction form
    18,752.64/28,128.99 = 5,614.26/x
  3. Step 3: Cross multiply
    18,752.64x = 28,128.99 × 5,614.26
  4. Step 4: Simplify right side
    18,752.64x = 157,923,463.40
  5. Step 5: Solve for x
    x = 157,923,463.40/18,752.64
  6. Step 6: Final answer
    x = 8,421.40

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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.