Home / 12,120.10-16,718.61-7,635.94

Finding the Fourth Proportional to 12,120.10, 16,718.61 and 7,635.94

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Solution

The fourth proportional to 12,120.10, 16,718.61 and 7,635.94 is: 10,533.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.10 : 16,718.61 = 7,635.94 : x
  2. Step 2: Convert to fraction form
    12,120.10/16,718.61 = 7,635.94/x
  3. Step 3: Cross multiply
    12,120.10x = 16,718.61 × 7,635.94
  4. Step 4: Simplify right side
    12,120.10x = 127,662,302.84
  5. Step 5: Solve for x
    x = 127,662,302.84/12,120.10
  6. Step 6: Final answer
    x = 10,533.11

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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.