Home / 12,342.61-18,512.85-9,989.76

Finding the Fourth Proportional to 12,342.61, 18,512.85 and 9,989.76

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Solution

The fourth proportional to 12,342.61, 18,512.85 and 9,989.76 is: 14,983.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,342.61 : 18,512.85 = 9,989.76 : x
  2. Step 2: Convert to fraction form
    12,342.61/18,512.85 = 9,989.76/x
  3. Step 3: Cross multiply
    12,342.61x = 18,512.85 × 9,989.76
  4. Step 4: Simplify right side
    12,342.61x = 184,939,035.30
  5. Step 5: Solve for x
    x = 184,939,035.30/12,342.61
  6. Step 6: Final answer
    x = 14,983.79

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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.