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Finding the Fourth Proportional to 18,668.76, 28,002.40 and 4,628.82

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Solution

The fourth proportional to 18,668.76, 28,002.40 and 4,628.82 is: 6,943.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.76 : 28,002.40 = 4,628.82 : x
  2. Step 2: Convert to fraction form
    18,668.76/28,002.40 = 4,628.82/x
  3. Step 3: Cross multiply
    18,668.76x = 28,002.40 × 4,628.82
  4. Step 4: Simplify right side
    18,668.76x = 129,618,069.17
  5. Step 5: Solve for x
    x = 129,618,069.17/18,668.76
  6. Step 6: Final answer
    x = 6,943.05

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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.