Home / 12,420.30-18,630.45-6,588.30

Finding the Fourth Proportional to 12,420.30, 18,630.45 and 6,588.30

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Solution

The fourth proportional to 12,420.30, 18,630.45 and 6,588.30 is: 9,882.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.30 : 18,630.45 = 6,588.30 : x
  2. Step 2: Convert to fraction form
    12,420.30/18,630.45 = 6,588.30/x
  3. Step 3: Cross multiply
    12,420.30x = 18,630.45 × 6,588.30
  4. Step 4: Simplify right side
    12,420.30x = 122,742,993.74
  5. Step 5: Solve for x
    x = 122,742,993.74/12,420.30
  6. Step 6: Final answer
    x = 9,882.45

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1.5x scale

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.