Home / 21,955.13-30,298.82-13,455.62

Finding the Fourth Proportional to 21,955.13, 30,298.82 and 13,455.62

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Solution

The fourth proportional to 21,955.13, 30,298.82 and 13,455.62 is: 18,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.13 : 30,298.82 = 13,455.62 : x
  2. Step 2: Convert to fraction form
    21,955.13/30,298.82 = 13,455.62/x
  3. Step 3: Cross multiply
    21,955.13x = 30,298.82 × 13,455.62
  4. Step 4: Simplify right side
    21,955.13x = 407,689,189.60
  5. Step 5: Solve for x
    x = 407,689,189.60/21,955.13
  6. Step 6: Final answer
    x = 18,569.20

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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.