Home / 21,512.10-29,666.04-13,955.66

Finding the Fourth Proportional to 21,512.10, 29,666.04 and 13,955.66

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Solution

The fourth proportional to 21,512.10, 29,666.04 and 13,955.66 is: 19,245.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.10 : 29,666.04 = 13,955.66 : x
  2. Step 2: Convert to fraction form
    21,512.10/29,666.04 = 13,955.66/x
  3. Step 3: Cross multiply
    21,512.10x = 29,666.04 × 13,955.66
  4. Step 4: Simplify right side
    21,512.10x = 414,009,167.79
  5. Step 5: Solve for x
    x = 414,009,167.79/21,512.10
  6. Step 6: Final answer
    x = 19,245.41

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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.