Home / 21,109.34-29,130-11,677.30

Finding the Fourth Proportional to 21,109.34, 29,130 and 11,677.30

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Solution

The fourth proportional to 21,109.34, 29,130 and 11,677.30 is: 16,114.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.34 : 29,130 = 11,677.30 : x
  2. Step 2: Convert to fraction form
    21,109.34/29,130 = 11,677.30/x
  3. Step 3: Cross multiply
    21,109.34x = 29,130 × 11,677.30
  4. Step 4: Simplify right side
    21,109.34x = 340,159,749
  5. Step 5: Solve for x
    x = 340,159,749/21,109.34
  6. Step 6: Final answer
    x = 16,114.18

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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.