Home / 55,979.75-83,938.02-20,905.13

Finding the Fourth Proportional to 55,979.75, 83,938.02 and 20,905.13

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Solution

The fourth proportional to 55,979.75, 83,938.02 and 20,905.13 is: 31,345.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,979.75 : 83,938.02 = 20,905.13 : x
  2. Step 2: Convert to fraction form
    55,979.75/83,938.02 = 20,905.13/x
  3. Step 3: Cross multiply
    55,979.75x = 83,938.02 × 20,905.13
  4. Step 4: Simplify right side
    55,979.75x = 1,754,735,220.04
  5. Step 5: Solve for x
    x = 1,754,735,220.04/55,979.75
  6. Step 6: Final answer
    x = 31,345.89

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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.