Home / 13,590.18-18,765.07-8,812.40

Finding the Fourth Proportional to 13,590.18, 18,765.07 and 8,812.40

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Solution

The fourth proportional to 13,590.18, 18,765.07 and 8,812.40 is: 12,167.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.18 : 18,765.07 = 8,812.40 : x
  2. Step 2: Convert to fraction form
    13,590.18/18,765.07 = 8,812.40/x
  3. Step 3: Cross multiply
    13,590.18x = 18,765.07 × 8,812.40
  4. Step 4: Simplify right side
    13,590.18x = 165,365,187.01
  5. Step 5: Solve for x
    x = 165,365,187.01/13,590.18
  6. Step 6: Final answer
    x = 12,167.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.