Home / 12,695.24-18,946.44-12,400.40

Finding the Fourth Proportional to 12,695.24, 18,946.44 and 12,400.40

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Solution

The fourth proportional to 12,695.24, 18,946.44 and 12,400.40 is: 18,506.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.24 : 18,946.44 = 12,400.40 : x
  2. Step 2: Convert to fraction form
    12,695.24/18,946.44 = 12,400.40/x
  3. Step 3: Cross multiply
    12,695.24x = 18,946.44 × 12,400.40
  4. Step 4: Simplify right side
    12,695.24x = 234,943,434.58
  5. Step 5: Solve for x
    x = 234,943,434.58/12,695.24
  6. Step 6: Final answer
    x = 18,506.42

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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.