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Finding the Fourth Proportional to 19,358.40, 29,010.60 and 15,416.40

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Solution

The fourth proportional to 19,358.40, 29,010.60 and 15,416.40 is: 23,103.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,358.40 : 29,010.60 = 15,416.40 : x
  2. Step 2: Convert to fraction form
    19,358.40/29,010.60 = 15,416.40/x
  3. Step 3: Cross multiply
    19,358.40x = 29,010.60 × 15,416.40
  4. Step 4: Simplify right side
    19,358.40x = 447,239,013.84
  5. Step 5: Solve for x
    x = 447,239,013.84/19,358.40
  6. Step 6: Final answer
    x = 23,103.10

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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.