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Finding the Fourth Proportional to 28,958.70, 43,328.70 and 19,117.20

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Solution

The fourth proportional to 28,958.70, 43,328.70 and 19,117.20 is: 28,603.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,958.70 : 43,328.70 = 19,117.20 : x
  2. Step 2: Convert to fraction form
    28,958.70/43,328.70 = 19,117.20/x
  3. Step 3: Cross multiply
    28,958.70x = 43,328.70 × 19,117.20
  4. Step 4: Simplify right side
    28,958.70x = 828,323,423.64
  5. Step 5: Solve for x
    x = 828,323,423.64/28,958.70
  6. Step 6: Final answer
    x = 28,603.61

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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.