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Finding the Fourth Proportional to 18,946.50, 28,419.78 and 5,095.50

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Solution

The fourth proportional to 18,946.50, 28,419.78 and 5,095.50 is: 7,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946.50 : 28,419.78 = 5,095.50 : x
  2. Step 2: Convert to fraction form
    18,946.50/28,419.78 = 5,095.50/x
  3. Step 3: Cross multiply
    18,946.50x = 28,419.78 × 5,095.50
  4. Step 4: Simplify right side
    18,946.50x = 144,812,988.99
  5. Step 5: Solve for x
    x = 144,812,988.99/18,946.50
  6. Step 6: Final answer
    x = 7,643.26

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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.