Home / 20,905.29-28,848.29-11,953.77

Finding the Fourth Proportional to 20,905.29, 28,848.29 and 11,953.77

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Solution

The fourth proportional to 20,905.29, 28,848.29 and 11,953.77 is: 16,495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.29 : 28,848.29 = 11,953.77 : x
  2. Step 2: Convert to fraction form
    20,905.29/28,848.29 = 11,953.77/x
  3. Step 3: Cross multiply
    20,905.29x = 28,848.29 × 11,953.77
  4. Step 4: Simplify right side
    20,905.29x = 344,845,763.78
  5. Step 5: Solve for x
    x = 344,845,763.78/20,905.29
  6. Step 6: Final answer
    x = 16,495.63

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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.