Home / 12,528.30-18,694.41-12,455.40

Finding the Fourth Proportional to 12,528.30, 18,694.41 and 12,455.40

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Solution

The fourth proportional to 12,528.30, 18,694.41 and 12,455.40 is: 18,585.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528.30 : 18,694.41 = 12,455.40 : x
  2. Step 2: Convert to fraction form
    12,528.30/18,694.41 = 12,455.40/x
  3. Step 3: Cross multiply
    12,528.30x = 18,694.41 × 12,455.40
  4. Step 4: Simplify right side
    12,528.30x = 232,846,354.31
  5. Step 5: Solve for x
    x = 232,846,354.31/12,528.30
  6. Step 6: Final answer
    x = 18,585.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.