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Finding the Fourth Proportional to 45,283.76, 67,903.79 and 18,981.44

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Solution

The fourth proportional to 45,283.76, 67,903.79 and 18,981.44 is: 28,462.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,283.76 : 67,903.79 = 18,981.44 : x
  2. Step 2: Convert to fraction form
    45,283.76/67,903.79 = 18,981.44/x
  3. Step 3: Cross multiply
    45,283.76x = 67,903.79 × 18,981.44
  4. Step 4: Simplify right side
    45,283.76x = 1,288,911,281.23
  5. Step 5: Solve for x
    x = 1,288,911,281.23/45,283.76
  6. Step 6: Final answer
    x = 28,462.99

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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.