Home / 21,017.12-29,015.52-13,953.20

Finding the Fourth Proportional to 21,017.12, 29,015.52 and 13,953.20

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Solution

The fourth proportional to 21,017.12, 29,015.52 and 13,953.20 is: 19,263.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.12 : 29,015.52 = 13,953.20 : x
  2. Step 2: Convert to fraction form
    21,017.12/29,015.52 = 13,953.20/x
  3. Step 3: Cross multiply
    21,017.12x = 29,015.52 × 13,953.20
  4. Step 4: Simplify right side
    21,017.12x = 404,859,353.66
  5. Step 5: Solve for x
    x = 404,859,353.66/21,017.12
  6. Step 6: Final answer
    x = 19,263.31

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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.