Home / 21,159.26-29,186.51-13,615.40

Finding the Fourth Proportional to 21,159.26, 29,186.51 and 13,615.40

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Solution

The fourth proportional to 21,159.26, 29,186.51 and 13,615.40 is: 18,780.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.26 : 29,186.51 = 13,615.40 : x
  2. Step 2: Convert to fraction form
    21,159.26/29,186.51 = 13,615.40/x
  3. Step 3: Cross multiply
    21,159.26x = 29,186.51 × 13,615.40
  4. Step 4: Simplify right side
    21,159.26x = 397,385,794.24
  5. Step 5: Solve for x
    x = 397,385,794.24/21,159.26
  6. Step 6: Final answer
    x = 18,780.70

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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.