Home / 21,140.40-29,126.76-13,957.56

Finding the Fourth Proportional to 21,140.40, 29,126.76 and 13,957.56

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Solution

The fourth proportional to 21,140.40, 29,126.76 and 13,957.56 is: 19,230.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.40 : 29,126.76 = 13,957.56 : x
  2. Step 2: Convert to fraction form
    21,140.40/29,126.76 = 13,957.56/x
  3. Step 3: Cross multiply
    21,140.40x = 29,126.76 × 13,957.56
  4. Step 4: Simplify right side
    21,140.40x = 406,538,500.31
  5. Step 5: Solve for x
    x = 406,538,500.31/21,140.40
  6. Step 6: Final answer
    x = 19,230.41

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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.