Home / 21,031.79-29,023.81-12,079.87

Finding the Fourth Proportional to 21,031.79, 29,023.81 and 12,079.87

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Solution

The fourth proportional to 21,031.79, 29,023.81 and 12,079.87 is: 16,670.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.79 : 29,023.81 = 12,079.87 : x
  2. Step 2: Convert to fraction form
    21,031.79/29,023.81 = 12,079.87/x
  3. Step 3: Cross multiply
    21,031.79x = 29,023.81 × 12,079.87
  4. Step 4: Simplify right side
    21,031.79x = 350,603,791.31
  5. Step 5: Solve for x
    x = 350,603,791.31/21,031.79
  6. Step 6: Final answer
    x = 16,670.19

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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.