Home / 21,421.01-29,556.87-13,866.29

Finding the Fourth Proportional to 21,421.01, 29,556.87 and 13,866.29

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Solution

The fourth proportional to 21,421.01, 29,556.87 and 13,866.29 is: 19,132.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.01 : 29,556.87 = 13,866.29 : x
  2. Step 2: Convert to fraction form
    21,421.01/29,556.87 = 13,866.29/x
  3. Step 3: Cross multiply
    21,421.01x = 29,556.87 × 13,866.29
  4. Step 4: Simplify right side
    21,421.01x = 409,844,130.91
  5. Step 5: Solve for x
    x = 409,844,130.91/21,421.01
  6. Step 6: Final answer
    x = 19,132.81

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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.