Home / 21,289.90-29,378.64-12,335.81

Finding the Fourth Proportional to 21,289.90, 29,378.64 and 12,335.81

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Solution

The fourth proportional to 21,289.90, 29,378.64 and 12,335.81 is: 17,022.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.90 : 29,378.64 = 12,335.81 : x
  2. Step 2: Convert to fraction form
    21,289.90/29,378.64 = 12,335.81/x
  3. Step 3: Cross multiply
    21,289.90x = 29,378.64 × 12,335.81
  4. Step 4: Simplify right side
    21,289.90x = 362,409,174.21
  5. Step 5: Solve for x
    x = 362,409,174.21/21,289.90
  6. Step 6: Final answer
    x = 17,022.59

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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.