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Finding the Fourth Proportional to 7,122.13, 9,828.07 and 3,935.45

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Solution

The fourth proportional to 7,122.13, 9,828.07 and 3,935.45 is: 5,430.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.13 : 9,828.07 = 3,935.45 : x
  2. Step 2: Convert to fraction form
    7,122.13/9,828.07 = 3,935.45/x
  3. Step 3: Cross multiply
    7,122.13x = 9,828.07 × 3,935.45
  4. Step 4: Simplify right side
    7,122.13x = 38,677,892.81
  5. Step 5: Solve for x
    x = 38,677,892.81/7,122.13
  6. Step 6: Final answer
    x = 5,430.67

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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.