Home / 20,905-28,848.95-11,473.54

Finding the Fourth Proportional to 20,905, 28,848.95 and 11,473.54

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Solution

The fourth proportional to 20,905, 28,848.95 and 11,473.54 is: 15,833.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905 : 28,848.95 = 11,473.54 : x
  2. Step 2: Convert to fraction form
    20,905/28,848.95 = 11,473.54/x
  3. Step 3: Cross multiply
    20,905x = 28,848.95 × 11,473.54
  4. Step 4: Simplify right side
    20,905x = 330,999,581.78
  5. Step 5: Solve for x
    x = 330,999,581.78/20,905
  6. Step 6: Final answer
    x = 15,833.51

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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.