Home / 55,985.76-83,979.90-20,906.28

Finding the Fourth Proportional to 55,985.76, 83,979.90 and 20,906.28

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Solution

The fourth proportional to 55,985.76, 83,979.90 and 20,906.28 is: 31,359.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,985.76 : 83,979.90 = 20,906.28 : x
  2. Step 2: Convert to fraction form
    55,985.76/83,979.90 = 20,906.28/x
  3. Step 3: Cross multiply
    55,985.76x = 83,979.90 × 20,906.28
  4. Step 4: Simplify right side
    55,985.76x = 1,755,707,303.77
  5. Step 5: Solve for x
    x = 1,755,707,303.77/55,985.76
  6. Step 6: Final answer
    x = 31,359.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.