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Finding the Fourth Proportional to 12,685.65, 19,004.76 and 10,618.94

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Solution

The fourth proportional to 12,685.65, 19,004.76 and 10,618.94 is: 15,908.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.65 : 19,004.76 = 10,618.94 : x
  2. Step 2: Convert to fraction form
    12,685.65/19,004.76 = 10,618.94/x
  3. Step 3: Cross multiply
    12,685.65x = 19,004.76 × 10,618.94
  4. Step 4: Simplify right side
    12,685.65x = 201,810,311.13
  5. Step 5: Solve for x
    x = 201,810,311.13/12,685.65
  6. Step 6: Final answer
    x = 15,908.55

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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.