Home / 18,388.89-25,376.49-10,005.39

Finding the Fourth Proportional to 18,388.89, 25,376.49 and 10,005.39

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Solution

The fourth proportional to 18,388.89, 25,376.49 and 10,005.39 is: 13,807.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.89 : 25,376.49 = 10,005.39 : x
  2. Step 2: Convert to fraction form
    18,388.89/25,376.49 = 10,005.39/x
  3. Step 3: Cross multiply
    18,388.89x = 25,376.49 × 10,005.39
  4. Step 4: Simplify right side
    18,388.89x = 253,901,679.28
  5. Step 5: Solve for x
    x = 253,901,679.28/18,388.89
  6. Step 6: Final answer
    x = 13,807.34

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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.