Home / 19,715.34-27,189.40-12,640.38

Finding the Fourth Proportional to 19,715.34, 27,189.40 and 12,640.38

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Solution

The fourth proportional to 19,715.34, 27,189.40 and 12,640.38 is: 17,432.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,715.34 : 27,189.40 = 12,640.38 : x
  2. Step 2: Convert to fraction form
    19,715.34/27,189.40 = 12,640.38/x
  3. Step 3: Cross multiply
    19,715.34x = 27,189.40 × 12,640.38
  4. Step 4: Simplify right side
    19,715.34x = 343,684,347.97
  5. Step 5: Solve for x
    x = 343,684,347.97/19,715.34
  6. Step 6: Final answer
    x = 17,432.33

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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.