Home / 20,663.07-28,515.14-11,231.63

Finding the Fourth Proportional to 20,663.07, 28,515.14 and 11,231.63

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Solution

The fourth proportional to 20,663.07, 28,515.14 and 11,231.63 is: 15,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.07 : 28,515.14 = 11,231.63 : x
  2. Step 2: Convert to fraction form
    20,663.07/28,515.14 = 11,231.63/x
  3. Step 3: Cross multiply
    20,663.07x = 28,515.14 × 11,231.63
  4. Step 4: Simplify right side
    20,663.07x = 320,271,303.14
  5. Step 5: Solve for x
    x = 320,271,303.14/20,663.07
  6. Step 6: Final answer
    x = 15,499.70

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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.