Home / 13,985.19-20,971.51-4,121.01

Finding the Fourth Proportional to 13,985.19, 20,971.51 and 4,121.01

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Solution

The fourth proportional to 13,985.19, 20,971.51 and 4,121.01 is: 6,179.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.19 : 20,971.51 = 4,121.01 : x
  2. Step 2: Convert to fraction form
    13,985.19/20,971.51 = 4,121.01/x
  3. Step 3: Cross multiply
    13,985.19x = 20,971.51 × 4,121.01
  4. Step 4: Simplify right side
    13,985.19x = 86,423,792.12
  5. Step 5: Solve for x
    x = 86,423,792.12/13,985.19
  6. Step 6: Final answer
    x = 6,179.67

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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.