Home / 21,858.30-30,164.40-12,298.20

Finding the Fourth Proportional to 21,858.30, 30,164.40 and 12,298.20

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Solution

The fourth proportional to 21,858.30, 30,164.40 and 12,298.20 is: 16,971.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.30 : 30,164.40 = 12,298.20 : x
  2. Step 2: Convert to fraction form
    21,858.30/30,164.40 = 12,298.20/x
  3. Step 3: Cross multiply
    21,858.30x = 30,164.40 × 12,298.20
  4. Step 4: Simplify right side
    21,858.30x = 370,967,824.08
  5. Step 5: Solve for x
    x = 370,967,824.08/21,858.30
  6. Step 6: Final answer
    x = 16,971.49

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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.