Home / 21,318.19-29,420.01-11,886.75

Finding the Fourth Proportional to 21,318.19, 29,420.01 and 11,886.75

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Solution

The fourth proportional to 21,318.19, 29,420.01 and 11,886.75 is: 16,404.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.19 : 29,420.01 = 11,886.75 : x
  2. Step 2: Convert to fraction form
    21,318.19/29,420.01 = 11,886.75/x
  3. Step 3: Cross multiply
    21,318.19x = 29,420.01 × 11,886.75
  4. Step 4: Simplify right side
    21,318.19x = 349,708,303.87
  5. Step 5: Solve for x
    x = 349,708,303.87/21,318.19
  6. Step 6: Final answer
    x = 16,404.22

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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.