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Finding the Fourth Proportional to 13,580.30, 18,739.86 and 7,530.85

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Solution

The fourth proportional to 13,580.30, 18,739.86 and 7,530.85 is: 10,392.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.30 : 18,739.86 = 7,530.85 : x
  2. Step 2: Convert to fraction form
    13,580.30/18,739.86 = 7,530.85/x
  3. Step 3: Cross multiply
    13,580.30x = 18,739.86 × 7,530.85
  4. Step 4: Simplify right side
    13,580.30x = 141,127,006.81
  5. Step 5: Solve for x
    x = 141,127,006.81/13,580.30
  6. Step 6: Final answer
    x = 10,392.04

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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.