Home / 12,385.93-18,579.84-4,990.45

Finding the Fourth Proportional to 12,385.93, 18,579.84 and 4,990.45

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Solution

The fourth proportional to 12,385.93, 18,579.84 and 4,990.45 is: 7,486.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.93 : 18,579.84 = 4,990.45 : x
  2. Step 2: Convert to fraction form
    12,385.93/18,579.84 = 4,990.45/x
  3. Step 3: Cross multiply
    12,385.93x = 18,579.84 × 4,990.45
  4. Step 4: Simplify right side
    12,385.93x = 92,721,762.53
  5. Step 5: Solve for x
    x = 92,721,762.53/12,385.93
  6. Step 6: Final answer
    x = 7,486.06

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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.