Home / 21,840.79-30,149.64-15,044.35

Finding the Fourth Proportional to 21,840.79, 30,149.64 and 15,044.35

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Solution

The fourth proportional to 21,840.79, 30,149.64 and 15,044.35 is: 20,767.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,840.79 : 30,149.64 = 15,044.35 : x
  2. Step 2: Convert to fraction form
    21,840.79/30,149.64 = 15,044.35/x
  3. Step 3: Cross multiply
    21,840.79x = 30,149.64 × 15,044.35
  4. Step 4: Simplify right side
    21,840.79x = 453,581,736.53
  5. Step 5: Solve for x
    x = 453,581,736.53/21,840.79
  6. Step 6: Final answer
    x = 20,767.64

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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.