Home / 20,946.72-31,420.02-13,161

Finding the Fourth Proportional to 20,946.72, 31,420.02 and 13,161

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Solution

The fourth proportional to 20,946.72, 31,420.02 and 13,161 is: 19,741.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.72 : 31,420.02 = 13,161 : x
  2. Step 2: Convert to fraction form
    20,946.72/31,420.02 = 13,161/x
  3. Step 3: Cross multiply
    20,946.72x = 31,420.02 × 13,161
  4. Step 4: Simplify right side
    20,946.72x = 413,518,883.22
  5. Step 5: Solve for x
    x = 413,518,883.22/20,946.72
  6. Step 6: Final answer
    x = 19,741.46

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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.