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Finding the Fourth Proportional to 15,673.71, 21,635.74 and 10,640.18

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Solution

The fourth proportional to 15,673.71, 21,635.74 and 10,640.18 is: 14,687.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,673.71 : 21,635.74 = 10,640.18 : x
  2. Step 2: Convert to fraction form
    15,673.71/21,635.74 = 10,640.18/x
  3. Step 3: Cross multiply
    15,673.71x = 21,635.74 × 10,640.18
  4. Step 4: Simplify right side
    15,673.71x = 230,208,006.65
  5. Step 5: Solve for x
    x = 230,208,006.65/15,673.71
  6. Step 6: Final answer
    x = 14,687.53

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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.