Home / 21,259.21-29,327.90-13,707.97

Finding the Fourth Proportional to 21,259.21, 29,327.90 and 13,707.97

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Solution

The fourth proportional to 21,259.21, 29,327.90 and 13,707.97 is: 18,910.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.21 : 29,327.90 = 13,707.97 : x
  2. Step 2: Convert to fraction form
    21,259.21/29,327.90 = 13,707.97/x
  3. Step 3: Cross multiply
    21,259.21x = 29,327.90 × 13,707.97
  4. Step 4: Simplify right side
    21,259.21x = 402,025,897.55
  5. Step 5: Solve for x
    x = 402,025,897.55/21,259.21
  6. Step 6: Final answer
    x = 18,910.67

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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.