Home / 13,128.21-19,699.81-4,807.13

Finding the Fourth Proportional to 13,128.21, 19,699.81 and 4,807.13

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Solution

The fourth proportional to 13,128.21, 19,699.81 and 4,807.13 is: 7,213.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.21 : 19,699.81 = 4,807.13 : x
  2. Step 2: Convert to fraction form
    13,128.21/19,699.81 = 4,807.13/x
  3. Step 3: Cross multiply
    13,128.21x = 19,699.81 × 4,807.13
  4. Step 4: Simplify right side
    13,128.21x = 94,699,437.13
  5. Step 5: Solve for x
    x = 94,699,437.13/13,128.21
  6. Step 6: Final answer
    x = 7,213.43

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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.