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Finding the Fourth Proportional to 13,590.18, 18,750.34 and 8,559.38

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Solution

The fourth proportional to 13,590.18, 18,750.34 and 8,559.38 is: 11,809.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.18 : 18,750.34 = 8,559.38 : x
  2. Step 2: Convert to fraction form
    13,590.18/18,750.34 = 8,559.38/x
  3. Step 3: Cross multiply
    13,590.18x = 18,750.34 × 8,559.38
  4. Step 4: Simplify right side
    13,590.18x = 160,491,285.19
  5. Step 5: Solve for x
    x = 160,491,285.19/13,590.18
  6. Step 6: Final answer
    x = 11,809.36

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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.