Home / 20,653.34-28,501.61-11,221.88

Finding the Fourth Proportional to 20,653.34, 28,501.61 and 11,221.88

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Solution

The fourth proportional to 20,653.34, 28,501.61 and 11,221.88 is: 15,486.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.34 : 28,501.61 = 11,221.88 : x
  2. Step 2: Convert to fraction form
    20,653.34/28,501.61 = 11,221.88/x
  3. Step 3: Cross multiply
    20,653.34x = 28,501.61 × 11,221.88
  4. Step 4: Simplify right side
    20,653.34x = 319,841,448.61
  5. Step 5: Solve for x
    x = 319,841,448.61/20,653.34
  6. Step 6: Final answer
    x = 15,486.19

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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.