Home / 19,981.05-29,973.06-5,190.05

Finding the Fourth Proportional to 19,981.05, 29,973.06 and 5,190.05

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Solution

The fourth proportional to 19,981.05, 29,973.06 and 5,190.05 is: 7,785.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.05 : 29,973.06 = 5,190.05 : x
  2. Step 2: Convert to fraction form
    19,981.05/29,973.06 = 5,190.05/x
  3. Step 3: Cross multiply
    19,981.05x = 29,973.06 × 5,190.05
  4. Step 4: Simplify right side
    19,981.05x = 155,561,530.19
  5. Step 5: Solve for x
    x = 155,561,530.19/19,981.05
  6. Step 6: Final answer
    x = 7,785.45

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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.