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Finding the Fourth Proportional to 13,590.69, 20,391.93 and 7,355.10

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Solution

The fourth proportional to 13,590.69, 20,391.93 and 7,355.10 is: 11,035.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.69 : 20,391.93 = 7,355.10 : x
  2. Step 2: Convert to fraction form
    13,590.69/20,391.93 = 7,355.10/x
  3. Step 3: Cross multiply
    13,590.69x = 20,391.93 × 7,355.10
  4. Step 4: Simplify right side
    13,590.69x = 149,984,684.34
  5. Step 5: Solve for x
    x = 149,984,684.34/13,590.69
  6. Step 6: Final answer
    x = 11,035.84

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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.