Home / 20,666.45-28,518.91-11,235.02

Finding the Fourth Proportional to 20,666.45, 28,518.91 and 11,235.02

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Solution

The fourth proportional to 20,666.45, 28,518.91 and 11,235.02 is: 15,503.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.45 : 28,518.91 = 11,235.02 : x
  2. Step 2: Convert to fraction form
    20,666.45/28,518.91 = 11,235.02/x
  3. Step 3: Cross multiply
    20,666.45x = 28,518.91 × 11,235.02
  4. Step 4: Simplify right side
    20,666.45x = 320,410,325.46
  5. Step 5: Solve for x
    x = 320,410,325.46/20,666.45
  6. Step 6: Final answer
    x = 15,503.89

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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.