Home / 21,349.11-29,460.11-12,397.28

Finding the Fourth Proportional to 21,349.11, 29,460.11 and 12,397.28

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Solution

The fourth proportional to 21,349.11, 29,460.11 and 12,397.28 is: 17,107.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,349.11 : 29,460.11 = 12,397.28 : x
  2. Step 2: Convert to fraction form
    21,349.11/29,460.11 = 12,397.28/x
  3. Step 3: Cross multiply
    21,349.11x = 29,460.11 × 12,397.28
  4. Step 4: Simplify right side
    21,349.11x = 365,225,133.69
  5. Step 5: Solve for x
    x = 365,225,133.69/21,349.11
  6. Step 6: Final answer
    x = 17,107.28

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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.