Home / 18,371.86-25,353.12-9,988.36

Finding the Fourth Proportional to 18,371.86, 25,353.12 and 9,988.36

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Solution

The fourth proportional to 18,371.86, 25,353.12 and 9,988.36 is: 13,783.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.86 : 25,353.12 = 9,988.36 : x
  2. Step 2: Convert to fraction form
    18,371.86/25,353.12 = 9,988.36/x
  3. Step 3: Cross multiply
    18,371.86x = 25,353.12 × 9,988.36
  4. Step 4: Simplify right side
    18,371.86x = 253,236,089.68
  5. Step 5: Solve for x
    x = 253,236,089.68/18,371.86
  6. Step 6: Final answer
    x = 13,783.91

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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.