Home / 13,421.54-18,521.66-7,371.91

Finding the Fourth Proportional to 13,421.54, 18,521.66 and 7,371.91

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Solution

The fourth proportional to 13,421.54, 18,521.66 and 7,371.91 is: 10,173.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.54 : 18,521.66 = 7,371.91 : x
  2. Step 2: Convert to fraction form
    13,421.54/18,521.66 = 7,371.91/x
  3. Step 3: Cross multiply
    13,421.54x = 18,521.66 × 7,371.91
  4. Step 4: Simplify right side
    13,421.54x = 136,539,881.10
  5. Step 5: Solve for x
    x = 136,539,881.10/13,421.54
  6. Step 6: Final answer
    x = 10,173.19

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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.