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Finding the Fourth Proportional to 19,218, 26,507.08 and 12,491.08

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Solution

The fourth proportional to 19,218, 26,507.08 and 12,491.08 is: 17,228.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218 : 26,507.08 = 12,491.08 : x
  2. Step 2: Convert to fraction form
    19,218/26,507.08 = 12,491.08/x
  3. Step 3: Cross multiply
    19,218x = 26,507.08 × 12,491.08
  4. Step 4: Simplify right side
    19,218x = 331,102,056.85
  5. Step 5: Solve for x
    x = 331,102,056.85/19,218
  6. Step 6: Final answer
    x = 17,228.75

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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.