Home / 12,638.99-18,970.13-6,403.34

Finding the Fourth Proportional to 12,638.99, 18,970.13 and 6,403.34

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Solution

The fourth proportional to 12,638.99, 18,970.13 and 6,403.34 is: 9,610.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.99 : 18,970.13 = 6,403.34 : x
  2. Step 2: Convert to fraction form
    12,638.99/18,970.13 = 6,403.34/x
  3. Step 3: Cross multiply
    12,638.99x = 18,970.13 × 6,403.34
  4. Step 4: Simplify right side
    12,638.99x = 121,472,160.22
  5. Step 5: Solve for x
    x = 121,472,160.22/12,638.99
  6. Step 6: Final answer
    x = 9,610.91

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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.