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Finding the Fourth Proportional to 13,428.01, 18,529.72 and 7,758.31

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Solution

The fourth proportional to 13,428.01, 18,529.72 and 7,758.31 is: 10,705.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.01 : 18,529.72 = 7,758.31 : x
  2. Step 2: Convert to fraction form
    13,428.01/18,529.72 = 7,758.31/x
  3. Step 3: Cross multiply
    13,428.01x = 18,529.72 × 7,758.31
  4. Step 4: Simplify right side
    13,428.01x = 143,759,358.30
  5. Step 5: Solve for x
    x = 143,759,358.30/13,428.01
  6. Step 6: Final answer
    x = 10,705.93

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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.