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Finding the Fourth Proportional to 13,009.60, 19,507.20 and 5,209.60

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Solution

The fourth proportional to 13,009.60, 19,507.20 and 5,209.60 is: 7,811.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,009.60 : 19,507.20 = 5,209.60 : x
  2. Step 2: Convert to fraction form
    13,009.60/19,507.20 = 5,209.60/x
  3. Step 3: Cross multiply
    13,009.60x = 19,507.20 × 5,209.60
  4. Step 4: Simplify right side
    13,009.60x = 101,624,709.12
  5. Step 5: Solve for x
    x = 101,624,709.12/13,009.60
  6. Step 6: Final answer
    x = 7,811.52

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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.