Home / 12,964.37-17,880.68-9,988.43

Finding the Fourth Proportional to 12,964.37, 17,880.68 and 9,988.43

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Solution

The fourth proportional to 12,964.37, 17,880.68 and 9,988.43 is: 13,776.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,964.37 : 17,880.68 = 9,988.43 : x
  2. Step 2: Convert to fraction form
    12,964.37/17,880.68 = 9,988.43/x
  3. Step 3: Cross multiply
    12,964.37x = 17,880.68 × 9,988.43
  4. Step 4: Simplify right side
    12,964.37x = 178,599,856.10
  5. Step 5: Solve for x
    x = 178,599,856.10/12,964.37
  6. Step 6: Final answer
    x = 13,776.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.