Home / 21,992.45-30,342.50-13,490.48

Finding the Fourth Proportional to 21,992.45, 30,342.50 and 13,490.48

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Solution

The fourth proportional to 21,992.45, 30,342.50 and 13,490.48 is: 18,612.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.45 : 30,342.50 = 13,490.48 : x
  2. Step 2: Convert to fraction form
    21,992.45/30,342.50 = 13,490.48/x
  3. Step 3: Cross multiply
    21,992.45x = 30,342.50 × 13,490.48
  4. Step 4: Simplify right side
    21,992.45x = 409,334,948.39
  5. Step 5: Solve for x
    x = 409,334,948.39/21,992.45
  6. Step 6: Final answer
    x = 18,612.53

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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.