Home / 19,668.21-27,142.18-10,715.78

Finding the Fourth Proportional to 19,668.21, 27,142.18 and 10,715.78

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Solution

The fourth proportional to 19,668.21, 27,142.18 and 10,715.78 is: 14,787.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,668.21 : 27,142.18 = 10,715.78 : x
  2. Step 2: Convert to fraction form
    19,668.21/27,142.18 = 10,715.78/x
  3. Step 3: Cross multiply
    19,668.21x = 27,142.18 × 10,715.78
  4. Step 4: Simplify right side
    19,668.21x = 290,849,629.60
  5. Step 5: Solve for x
    x = 290,849,629.60/19,668.21
  6. Step 6: Final answer
    x = 14,787.80

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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.