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Finding the Fourth Proportional to 18,878.52, 26,038.62 and 12,903.96

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Solution

The fourth proportional to 18,878.52, 26,038.62 and 12,903.96 is: 17,798.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.52 : 26,038.62 = 12,903.96 : x
  2. Step 2: Convert to fraction form
    18,878.52/26,038.62 = 12,903.96/x
  3. Step 3: Cross multiply
    18,878.52x = 26,038.62 × 12,903.96
  4. Step 4: Simplify right side
    18,878.52x = 336,001,310.94
  5. Step 5: Solve for x
    x = 336,001,310.94/18,878.52
  6. Step 6: Final answer
    x = 17,798.07

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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.