Home / 12,638.39-18,959.81-4,316.45

Finding the Fourth Proportional to 12,638.39, 18,959.81 and 4,316.45

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Solution

The fourth proportional to 12,638.39, 18,959.81 and 4,316.45 is: 6,475.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.39 : 18,959.81 = 4,316.45 : x
  2. Step 2: Convert to fraction form
    12,638.39/18,959.81 = 4,316.45/x
  3. Step 3: Cross multiply
    12,638.39x = 18,959.81 × 4,316.45
  4. Step 4: Simplify right side
    12,638.39x = 81,839,139.75
  5. Step 5: Solve for x
    x = 81,839,139.75/12,638.39
  6. Step 6: Final answer
    x = 6,475.44

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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.