Home / 15,427.40-21,289.70-8,712.97

Finding the Fourth Proportional to 15,427.40, 21,289.70 and 8,712.97

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Solution

The fourth proportional to 15,427.40, 21,289.70 and 8,712.97 is: 12,023.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,427.40 : 21,289.70 = 8,712.97 : x
  2. Step 2: Convert to fraction form
    15,427.40/21,289.70 = 8,712.97/x
  3. Step 3: Cross multiply
    15,427.40x = 21,289.70 × 8,712.97
  4. Step 4: Simplify right side
    15,427.40x = 185,496,485.97
  5. Step 5: Solve for x
    x = 185,496,485.97/15,427.40
  6. Step 6: Final answer
    x = 12,023.84

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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.