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Finding the Fourth Proportional to 28,694.70, 39,585.02 and 19,139

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Solution

The fourth proportional to 28,694.70, 39,585.02 and 19,139 is: 26,402.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,694.70 : 39,585.02 = 19,139 : x
  2. Step 2: Convert to fraction form
    28,694.70/39,585.02 = 19,139/x
  3. Step 3: Cross multiply
    28,694.70x = 39,585.02 × 19,139
  4. Step 4: Simplify right side
    28,694.70x = 757,617,697.78
  5. Step 5: Solve for x
    x = 757,617,697.78/28,694.70
  6. Step 6: Final answer
    x = 26,402.70

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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.