Home / 12,390.84-18,586.80-4,894.38

Finding the Fourth Proportional to 12,390.84, 18,586.80 and 4,894.38

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Solution

The fourth proportional to 12,390.84, 18,586.80 and 4,894.38 is: 7,341.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.84 : 18,586.80 = 4,894.38 : x
  2. Step 2: Convert to fraction form
    12,390.84/18,586.80 = 4,894.38/x
  3. Step 3: Cross multiply
    12,390.84x = 18,586.80 × 4,894.38
  4. Step 4: Simplify right side
    12,390.84x = 90,970,862.18
  5. Step 5: Solve for x
    x = 90,970,862.18/12,390.84
  6. Step 6: Final answer
    x = 7,341.78

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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.