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Finding the Fourth Proportional to 14,235.40, 19,689.78 and 12,579.40

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Solution

The fourth proportional to 14,235.40, 19,689.78 and 12,579.40 is: 17,399.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,235.40 : 19,689.78 = 12,579.40 : x
  2. Step 2: Convert to fraction form
    14,235.40/19,689.78 = 12,579.40/x
  3. Step 3: Cross multiply
    14,235.40x = 19,689.78 × 12,579.40
  4. Step 4: Simplify right side
    14,235.40x = 247,685,618.53
  5. Step 5: Solve for x
    x = 247,685,618.53/14,235.40
  6. Step 6: Final answer
    x = 17,399.27

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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.