Home / 21,637.72-29,878.26-13,693.96

Finding the Fourth Proportional to 21,637.72, 29,878.26 and 13,693.96

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Solution

The fourth proportional to 21,637.72, 29,878.26 and 13,693.96 is: 18,909.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,637.72 : 29,878.26 = 13,693.96 : x
  2. Step 2: Convert to fraction form
    21,637.72/29,878.26 = 13,693.96/x
  3. Step 3: Cross multiply
    21,637.72x = 29,878.26 × 13,693.96
  4. Step 4: Simplify right side
    21,637.72x = 409,151,697.31
  5. Step 5: Solve for x
    x = 409,151,697.31/21,637.72
  6. Step 6: Final answer
    x = 18,909.19

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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.