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Finding the Fourth Proportional to 28,392.70, 39,178.98 and 17,489.14

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Solution

The fourth proportional to 28,392.70, 39,178.98 and 17,489.14 is: 24,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,392.70 : 39,178.98 = 17,489.14 : x
  2. Step 2: Convert to fraction form
    28,392.70/39,178.98 = 17,489.14/x
  3. Step 3: Cross multiply
    28,392.70x = 39,178.98 × 17,489.14
  4. Step 4: Simplify right side
    28,392.70x = 685,206,666.28
  5. Step 5: Solve for x
    x = 685,206,666.28/28,392.70
  6. Step 6: Final answer
    x = 24,133.20

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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.