Home / 21,119.48-29,156.96-15,771.32

Finding the Fourth Proportional to 21,119.48, 29,156.96 and 15,771.32

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Solution

The fourth proportional to 21,119.48, 29,156.96 and 15,771.32 is: 21,773.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.48 : 29,156.96 = 15,771.32 : x
  2. Step 2: Convert to fraction form
    21,119.48/29,156.96 = 15,771.32/x
  3. Step 3: Cross multiply
    21,119.48x = 29,156.96 × 15,771.32
  4. Step 4: Simplify right side
    21,119.48x = 459,843,746.39
  5. Step 5: Solve for x
    x = 459,843,746.39/21,119.48
  6. Step 6: Final answer
    x = 21,773.44

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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.