Home / 15,426.99-21,288.20-8,712.90

Finding the Fourth Proportional to 15,426.99, 21,288.20 and 8,712.90

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Solution

The fourth proportional to 15,426.99, 21,288.20 and 8,712.90 is: 12,023.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,426.99 : 21,288.20 = 8,712.90 : x
  2. Step 2: Convert to fraction form
    15,426.99/21,288.20 = 8,712.90/x
  3. Step 3: Cross multiply
    15,426.99x = 21,288.20 × 8,712.90
  4. Step 4: Simplify right side
    15,426.99x = 185,481,914.22
  5. Step 5: Solve for x
    x = 185,481,914.22/15,426.99
  6. Step 6: Final answer
    x = 12,023.21

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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.