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Finding the Fourth Proportional to 18,242.70, 27,172.34 and 17,389.50

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Solution

The fourth proportional to 18,242.70, 27,172.34 and 17,389.50 is: 25,901.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,242.70 : 27,172.34 = 17,389.50 : x
  2. Step 2: Convert to fraction form
    18,242.70/27,172.34 = 17,389.50/x
  3. Step 3: Cross multiply
    18,242.70x = 27,172.34 × 17,389.50
  4. Step 4: Simplify right side
    18,242.70x = 472,513,319.48
  5. Step 5: Solve for x
    x = 472,513,319.48/18,242.70
  6. Step 6: Final answer
    x = 25,901.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.