Home / 21,955.20-30,288.20-13,992.47

Finding the Fourth Proportional to 21,955.20, 30,288.20 and 13,992.47

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Solution

The fourth proportional to 21,955.20, 30,288.20 and 13,992.47 is: 19,303.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.20 : 30,288.20 = 13,992.47 : x
  2. Step 2: Convert to fraction form
    21,955.20/30,288.20 = 13,992.47/x
  3. Step 3: Cross multiply
    21,955.20x = 30,288.20 × 13,992.47
  4. Step 4: Simplify right side
    21,955.20x = 423,806,825.28
  5. Step 5: Solve for x
    x = 423,806,825.28/21,955.20
  6. Step 6: Final answer
    x = 19,303.25

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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.