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Finding the Fourth Proportional to 19,128.42, 28,639.41 and 9,748.21

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Solution

The fourth proportional to 19,128.42, 28,639.41 and 9,748.21 is: 14,595.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.42 : 28,639.41 = 9,748.21 : x
  2. Step 2: Convert to fraction form
    19,128.42/28,639.41 = 9,748.21/x
  3. Step 3: Cross multiply
    19,128.42x = 28,639.41 × 9,748.21
  4. Step 4: Simplify right side
    19,128.42x = 279,182,982.96
  5. Step 5: Solve for x
    x = 279,182,982.96/19,128.42
  6. Step 6: Final answer
    x = 14,595.19

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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.