Home / 15,135.20-20,887.18-9,163.50

Finding the Fourth Proportional to 15,135.20, 20,887.18 and 9,163.50

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Solution

The fourth proportional to 15,135.20, 20,887.18 and 9,163.50 is: 12,646.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.20 : 20,887.18 = 9,163.50 : x
  2. Step 2: Convert to fraction form
    15,135.20/20,887.18 = 9,163.50/x
  3. Step 3: Cross multiply
    15,135.20x = 20,887.18 × 9,163.50
  4. Step 4: Simplify right side
    15,135.20x = 191,399,673.93
  5. Step 5: Solve for x
    x = 191,399,673.93/15,135.20
  6. Step 6: Final answer
    x = 12,646.00

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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.