Home / 19,391.69-26,772.78-13,421.18

Finding the Fourth Proportional to 19,391.69, 26,772.78 and 13,421.18

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Solution

The fourth proportional to 19,391.69, 26,772.78 and 13,421.18 is: 18,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,391.69 : 26,772.78 = 13,421.18 : x
  2. Step 2: Convert to fraction form
    19,391.69/26,772.78 = 13,421.18/x
  3. Step 3: Cross multiply
    19,391.69x = 26,772.78 × 13,421.18
  4. Step 4: Simplify right side
    19,391.69x = 359,322,165.62
  5. Step 5: Solve for x
    x = 359,322,165.62/19,391.69
  6. Step 6: Final answer
    x = 18,529.70

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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.