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Finding the Fourth Proportional to 18,718.61, 25,831.01 and 10,334.93

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Solution

The fourth proportional to 18,718.61, 25,831.01 and 10,334.93 is: 14,261.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.61 : 25,831.01 = 10,334.93 : x
  2. Step 2: Convert to fraction form
    18,718.61/25,831.01 = 10,334.93/x
  3. Step 3: Cross multiply
    18,718.61x = 25,831.01 × 10,334.93
  4. Step 4: Simplify right side
    18,718.61x = 266,961,628.50
  5. Step 5: Solve for x
    x = 266,961,628.50/18,718.61
  6. Step 6: Final answer
    x = 14,261.83

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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.