Home / 21,529.12-29,710.84-13,032.79

Finding the Fourth Proportional to 21,529.12, 29,710.84 and 13,032.79

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Solution

The fourth proportional to 21,529.12, 29,710.84 and 13,032.79 is: 17,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529.12 : 29,710.84 = 13,032.79 : x
  2. Step 2: Convert to fraction form
    21,529.12/29,710.84 = 13,032.79/x
  3. Step 3: Cross multiply
    21,529.12x = 29,710.84 × 13,032.79
  4. Step 4: Simplify right side
    21,529.12x = 387,215,138.44
  5. Step 5: Solve for x
    x = 387,215,138.44/21,529.12
  6. Step 6: Final answer
    x = 17,985.65

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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.