Home / 21,720.63-29,958.06-15,017.47

Finding the Fourth Proportional to 21,720.63, 29,958.06 and 15,017.47

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Solution

The fourth proportional to 21,720.63, 29,958.06 and 15,017.47 is: 20,712.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.63 : 29,958.06 = 15,017.47 : x
  2. Step 2: Convert to fraction form
    21,720.63/29,958.06 = 15,017.47/x
  3. Step 3: Cross multiply
    21,720.63x = 29,958.06 × 15,017.47
  4. Step 4: Simplify right side
    21,720.63x = 449,894,267.31
  5. Step 5: Solve for x
    x = 449,894,267.31/21,720.63
  6. Step 6: Final answer
    x = 20,712.76

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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.