Home / 21,097.45-29,117.64-13,142.24

Finding the Fourth Proportional to 21,097.45, 29,117.64 and 13,142.24

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Solution

The fourth proportional to 21,097.45, 29,117.64 and 13,142.24 is: 18,138.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,097.45 : 29,117.64 = 13,142.24 : x
  2. Step 2: Convert to fraction form
    21,097.45/29,117.64 = 13,142.24/x
  3. Step 3: Cross multiply
    21,097.45x = 29,117.64 × 13,142.24
  4. Step 4: Simplify right side
    21,097.45x = 382,671,013.11
  5. Step 5: Solve for x
    x = 382,671,013.11/21,097.45
  6. Step 6: Final answer
    x = 18,138.26

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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.