Home / 21,858.72-30,155.40-13,480.08

Finding the Fourth Proportional to 21,858.72, 30,155.40 and 13,480.08

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Solution

The fourth proportional to 21,858.72, 30,155.40 and 13,480.08 is: 18,596.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.72 : 30,155.40 = 13,480.08 : x
  2. Step 2: Convert to fraction form
    21,858.72/30,155.40 = 13,480.08/x
  3. Step 3: Cross multiply
    21,858.72x = 30,155.40 × 13,480.08
  4. Step 4: Simplify right side
    21,858.72x = 406,497,204.43
  5. Step 5: Solve for x
    x = 406,497,204.43/21,858.72
  6. Step 6: Final answer
    x = 18,596.57

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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.