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Finding the Fourth Proportional to 18,718.57, 25,827.72 and 10,955.94

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Solution

The fourth proportional to 18,718.57, 25,827.72 and 10,955.94 is: 15,116.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.57 : 25,827.72 = 10,955.94 : x
  2. Step 2: Convert to fraction form
    18,718.57/25,827.72 = 10,955.94/x
  3. Step 3: Cross multiply
    18,718.57x = 25,827.72 × 10,955.94
  4. Step 4: Simplify right side
    18,718.57x = 282,966,950.66
  5. Step 5: Solve for x
    x = 282,966,950.66/18,718.57
  6. Step 6: Final answer
    x = 15,116.91

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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.