Home / 12,478.07-17,214.21-8,443.46

Finding the Fourth Proportional to 12,478.07, 17,214.21 and 8,443.46

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Solution

The fourth proportional to 12,478.07, 17,214.21 and 8,443.46 is: 11,648.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.07 : 17,214.21 = 8,443.46 : x
  2. Step 2: Convert to fraction form
    12,478.07/17,214.21 = 8,443.46/x
  3. Step 3: Cross multiply
    12,478.07x = 17,214.21 × 8,443.46
  4. Step 4: Simplify right side
    12,478.07x = 145,347,407.50
  5. Step 5: Solve for x
    x = 145,347,407.50/12,478.07
  6. Step 6: Final answer
    x = 11,648.23

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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.