Home / 21,023.13-29,023.80-13,959.21

Finding the Fourth Proportional to 21,023.13, 29,023.80 and 13,959.21

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Solution

The fourth proportional to 21,023.13, 29,023.80 and 13,959.21 is: 19,271.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.13 : 29,023.80 = 13,959.21 : x
  2. Step 2: Convert to fraction form
    21,023.13/29,023.80 = 13,959.21/x
  3. Step 3: Cross multiply
    21,023.13x = 29,023.80 × 13,959.21
  4. Step 4: Simplify right side
    21,023.13x = 405,149,319.20
  5. Step 5: Solve for x
    x = 405,149,319.20/21,023.13
  6. Step 6: Final answer
    x = 19,271.60

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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.