Home / 12,390.12-18,588.02-5,371.30

Finding the Fourth Proportional to 12,390.12, 18,588.02 and 5,371.30

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Solution

The fourth proportional to 12,390.12, 18,588.02 and 5,371.30 is: 8,058.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.12 : 18,588.02 = 5,371.30 : x
  2. Step 2: Convert to fraction form
    12,390.12/18,588.02 = 5,371.30/x
  3. Step 3: Cross multiply
    12,390.12x = 18,588.02 × 5,371.30
  4. Step 4: Simplify right side
    12,390.12x = 99,841,831.83
  5. Step 5: Solve for x
    x = 99,841,831.83/12,390.12
  6. Step 6: Final answer
    x = 8,058.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.