Home / 20,653.38-28,501.75-11,221.95

Finding the Fourth Proportional to 20,653.38, 28,501.75 and 11,221.95

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Solution

The fourth proportional to 20,653.38, 28,501.75 and 11,221.95 is: 15,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.38 : 28,501.75 = 11,221.95 : x
  2. Step 2: Convert to fraction form
    20,653.38/28,501.75 = 11,221.95/x
  3. Step 3: Cross multiply
    20,653.38x = 28,501.75 × 11,221.95
  4. Step 4: Simplify right side
    20,653.38x = 319,845,030.71
  5. Step 5: Solve for x
    x = 319,845,030.71/20,653.38
  6. Step 6: Final answer
    x = 15,486.33

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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.