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Finding the Fourth Proportional to 13,145.71, 19,718.93 and 5,354.59

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Solution

The fourth proportional to 13,145.71, 19,718.93 and 5,354.59 is: 8,032.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.71 : 19,718.93 = 5,354.59 : x
  2. Step 2: Convert to fraction form
    13,145.71/19,718.93 = 5,354.59/x
  3. Step 3: Cross multiply
    13,145.71x = 19,718.93 × 5,354.59
  4. Step 4: Simplify right side
    13,145.71x = 105,586,758.62
  5. Step 5: Solve for x
    x = 105,586,758.62/13,145.71
  6. Step 6: Final answer
    x = 8,032.03

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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.