Home / 18,383.40-25,368.36-9,999.90

Finding the Fourth Proportional to 18,383.40, 25,368.36 and 9,999.90

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Solution

The fourth proportional to 18,383.40, 25,368.36 and 9,999.90 is: 13,799.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,383.40 : 25,368.36 = 9,999.90 : x
  2. Step 2: Convert to fraction form
    18,383.40/25,368.36 = 9,999.90/x
  3. Step 3: Cross multiply
    18,383.40x = 25,368.36 × 9,999.90
  4. Step 4: Simplify right side
    18,383.40x = 253,681,063.16
  5. Step 5: Solve for x
    x = 253,681,063.16/18,383.40
  6. Step 6: Final answer
    x = 13,799.46

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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.