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Finding the Fourth Proportional to 18,959.78, 26,148.74 and 14,235.86

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Solution

The fourth proportional to 18,959.78, 26,148.74 and 14,235.86 is: 19,633.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.78 : 26,148.74 = 14,235.86 : x
  2. Step 2: Convert to fraction form
    18,959.78/26,148.74 = 14,235.86/x
  3. Step 3: Cross multiply
    18,959.78x = 26,148.74 × 14,235.86
  4. Step 4: Simplify right side
    18,959.78x = 372,249,801.82
  5. Step 5: Solve for x
    x = 372,249,801.82/18,959.78
  6. Step 6: Final answer
    x = 19,633.66

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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.