Home / 20,666.50-28,519.70-11,235.00

Finding the Fourth Proportional to 20,666.50, 28,519.70 and 11,235.00

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Solution

The fourth proportional to 20,666.50, 28,519.70 and 11,235.00 is: 15,504.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.50 : 28,519.70 = 11,235.00 : x
  2. Step 2: Convert to fraction form
    20,666.50/28,519.70 = 11,235.00/x
  3. Step 3: Cross multiply
    20,666.50x = 28,519.70 × 11,235.00
  4. Step 4: Simplify right side
    20,666.50x = 320,418,686.90
  5. Step 5: Solve for x
    x = 320,418,686.90/20,666.50
  6. Step 6: Final answer
    x = 15,504.26

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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.