Home / 12,488.14-18,728.96-4,991.40

Finding the Fourth Proportional to 12,488.14, 18,728.96 and 4,991.40

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Solution

The fourth proportional to 12,488.14, 18,728.96 and 4,991.40 is: 7,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.14 : 18,728.96 = 4,991.40 : x
  2. Step 2: Convert to fraction form
    12,488.14/18,728.96 = 4,991.40/x
  3. Step 3: Cross multiply
    12,488.14x = 18,728.96 × 4,991.40
  4. Step 4: Simplify right side
    12,488.14x = 93,483,730.94
  5. Step 5: Solve for x
    x = 93,483,730.94/12,488.14
  6. Step 6: Final answer
    x = 7,485.80

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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.