Home / 12,590.04-18,887.34-5,190.40

Finding the Fourth Proportional to 12,590.04, 18,887.34 and 5,190.40

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Solution

The fourth proportional to 12,590.04, 18,887.34 and 5,190.40 is: 7,786.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.04 : 18,887.34 = 5,190.40 : x
  2. Step 2: Convert to fraction form
    12,590.04/18,887.34 = 5,190.40/x
  3. Step 3: Cross multiply
    12,590.04x = 18,887.34 × 5,190.40
  4. Step 4: Simplify right side
    12,590.04x = 98,032,849.54
  5. Step 5: Solve for x
    x = 98,032,849.54/12,590.04
  6. Step 6: Final answer
    x = 7,786.54

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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.