Home / 21,696.72-29,941.56-13,730.64

Finding the Fourth Proportional to 21,696.72, 29,941.56 and 13,730.64

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Solution

The fourth proportional to 21,696.72, 29,941.56 and 13,730.64 is: 18,948.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,696.72 : 29,941.56 = 13,730.64 : x
  2. Step 2: Convert to fraction form
    21,696.72/29,941.56 = 13,730.64/x
  3. Step 3: Cross multiply
    21,696.72x = 29,941.56 × 13,730.64
  4. Step 4: Simplify right side
    21,696.72x = 411,116,781.40
  5. Step 5: Solve for x
    x = 411,116,781.40/21,696.72
  6. Step 6: Final answer
    x = 18,948.34

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1.5x scale

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.