Home / 21,397.71-29,530.40-11,969.31

Finding the Fourth Proportional to 21,397.71, 29,530.40 and 11,969.31

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Solution

The fourth proportional to 21,397.71, 29,530.40 and 11,969.31 is: 16,518.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,397.71 : 29,530.40 = 11,969.31 : x
  2. Step 2: Convert to fraction form
    21,397.71/29,530.40 = 11,969.31/x
  3. Step 3: Cross multiply
    21,397.71x = 29,530.40 × 11,969.31
  4. Step 4: Simplify right side
    21,397.71x = 353,458,452.18
  5. Step 5: Solve for x
    x = 353,458,452.18/21,397.71
  6. Step 6: Final answer
    x = 16,518.52

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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.