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Finding the Fourth Proportional to 12,689.39, 19,039.53 and 4,903.67

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Solution

The fourth proportional to 12,689.39, 19,039.53 and 4,903.67 is: 7,357.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.39 : 19,039.53 = 4,903.67 : x
  2. Step 2: Convert to fraction form
    12,689.39/19,039.53 = 4,903.67/x
  3. Step 3: Cross multiply
    12,689.39x = 19,039.53 × 4,903.67
  4. Step 4: Simplify right side
    12,689.39x = 93,363,572.08
  5. Step 5: Solve for x
    x = 93,363,572.08/12,689.39
  6. Step 6: Final answer
    x = 7,357.61

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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.