Home / 12,639.79-18,962.45-3,875.39

Finding the Fourth Proportional to 12,639.79, 18,962.45 and 3,875.39

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Solution

The fourth proportional to 12,639.79, 18,962.45 and 3,875.39 is: 5,813.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.79 : 18,962.45 = 3,875.39 : x
  2. Step 2: Convert to fraction form
    12,639.79/18,962.45 = 3,875.39/x
  3. Step 3: Cross multiply
    12,639.79x = 18,962.45 × 3,875.39
  4. Step 4: Simplify right side
    12,639.79x = 73,486,841.70
  5. Step 5: Solve for x
    x = 73,486,841.70/12,639.79
  6. Step 6: Final answer
    x = 5,813.93

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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.