Home / 12,390.86-18,586.33-8,709.56

Finding the Fourth Proportional to 12,390.86, 18,586.33 and 8,709.56

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Solution

The fourth proportional to 12,390.86, 18,586.33 and 8,709.56 is: 13,064.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.86 : 18,586.33 = 8,709.56 : x
  2. Step 2: Convert to fraction form
    12,390.86/18,586.33 = 8,709.56/x
  3. Step 3: Cross multiply
    12,390.86x = 18,586.33 × 8,709.56
  4. Step 4: Simplify right side
    12,390.86x = 161,878,711.31
  5. Step 5: Solve for x
    x = 161,878,711.31/12,390.86
  6. Step 6: Final answer
    x = 13,064.36

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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.