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Finding the Fourth Proportional to 19,574.40, 29,404.80 and 13,742.40

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Solution

The fourth proportional to 19,574.40, 29,404.80 and 13,742.40 is: 20,643.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,574.40 : 29,404.80 = 13,742.40 : x
  2. Step 2: Convert to fraction form
    19,574.40/29,404.80 = 13,742.40/x
  3. Step 3: Cross multiply
    19,574.40x = 29,404.80 × 13,742.40
  4. Step 4: Simplify right side
    19,574.40x = 404,092,523.52
  5. Step 5: Solve for x
    x = 404,092,523.52/19,574.40
  6. Step 6: Final answer
    x = 20,643.93

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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.