Home / 12,315.36-18,490.14-8,558.28

Finding the Fourth Proportional to 12,315.36, 18,490.14 and 8,558.28

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Solution

The fourth proportional to 12,315.36, 18,490.14 and 8,558.28 is: 12,849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.36 : 18,490.14 = 8,558.28 : x
  2. Step 2: Convert to fraction form
    12,315.36/18,490.14 = 8,558.28/x
  3. Step 3: Cross multiply
    12,315.36x = 18,490.14 × 8,558.28
  4. Step 4: Simplify right side
    12,315.36x = 158,243,795.36
  5. Step 5: Solve for x
    x = 158,243,795.36/12,315.36
  6. Step 6: Final answer
    x = 12,849.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.