Home / 20,918.10-31,420.89-17,637.60

Finding the Fourth Proportional to 20,918.10, 31,420.89 and 17,637.60

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Solution

The fourth proportional to 20,918.10, 31,420.89 and 17,637.60 is: 26,493.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.10 : 31,420.89 = 17,637.60 : x
  2. Step 2: Convert to fraction form
    20,918.10/31,420.89 = 17,637.60/x
  3. Step 3: Cross multiply
    20,918.10x = 31,420.89 × 17,637.60
  4. Step 4: Simplify right side
    20,918.10x = 554,189,089.46
  5. Step 5: Solve for x
    x = 554,189,089.46/20,918.10
  6. Step 6: Final answer
    x = 26,493.28

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1.5x scale

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.