Home / 13,239.90-19,931.99-11,431.98

Finding the Fourth Proportional to 13,239.90, 19,931.99 and 11,431.98

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Solution

The fourth proportional to 13,239.90, 19,931.99 and 11,431.98 is: 17,210.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.90 : 19,931.99 = 11,431.98 : x
  2. Step 2: Convert to fraction form
    13,239.90/19,931.99 = 11,431.98/x
  3. Step 3: Cross multiply
    13,239.90x = 19,931.99 × 11,431.98
  4. Step 4: Simplify right side
    13,239.90x = 227,862,053.88
  5. Step 5: Solve for x
    x = 227,862,053.88/13,239.90
  6. Step 6: Final answer
    x = 17,210.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.