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Finding the Fourth Proportional to 18,139.76, 27,220.02 and 7,045.01

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Solution

The fourth proportional to 18,139.76, 27,220.02 and 7,045.01 is: 10,571.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.76 : 27,220.02 = 7,045.01 : x
  2. Step 2: Convert to fraction form
    18,139.76/27,220.02 = 7,045.01/x
  3. Step 3: Cross multiply
    18,139.76x = 27,220.02 × 7,045.01
  4. Step 4: Simplify right side
    18,139.76x = 191,765,313.10
  5. Step 5: Solve for x
    x = 191,765,313.10/18,139.76
  6. Step 6: Final answer
    x = 10,571.55

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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.