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Finding the Fourth Proportional to 19,395.64, 26,749.74 and 11,930.68

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Solution

The fourth proportional to 19,395.64, 26,749.74 and 11,930.68 is: 16,454.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,395.64 : 26,749.74 = 11,930.68 : x
  2. Step 2: Convert to fraction form
    19,395.64/26,749.74 = 11,930.68/x
  3. Step 3: Cross multiply
    19,395.64x = 26,749.74 × 11,930.68
  4. Step 4: Simplify right side
    19,395.64x = 319,142,588.02
  5. Step 5: Solve for x
    x = 319,142,588.02/19,395.64
  6. Step 6: Final answer
    x = 16,454.35

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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.