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Finding the Fourth Proportional to 28,981.62, 43,478.62 and 8,990.67

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Solution

The fourth proportional to 28,981.62, 43,478.62 and 8,990.67 is: 13,487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,981.62 : 43,478.62 = 8,990.67 : x
  2. Step 2: Convert to fraction form
    28,981.62/43,478.62 = 8,990.67/x
  3. Step 3: Cross multiply
    28,981.62x = 43,478.62 × 8,990.67
  4. Step 4: Simplify right side
    28,981.62x = 390,901,924.48
  5. Step 5: Solve for x
    x = 390,901,924.48/28,981.62
  6. Step 6: Final answer
    x = 13,487.93

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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.