Home / 20,290.34-27,991.76-11,903.06

Finding the Fourth Proportional to 20,290.34, 27,991.76 and 11,903.06

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Solution

The fourth proportional to 20,290.34, 27,991.76 and 11,903.06 is: 16,421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.34 : 27,991.76 = 11,903.06 : x
  2. Step 2: Convert to fraction form
    20,290.34/27,991.76 = 11,903.06/x
  3. Step 3: Cross multiply
    20,290.34x = 27,991.76 × 11,903.06
  4. Step 4: Simplify right side
    20,290.34x = 333,187,598.79
  5. Step 5: Solve for x
    x = 333,187,598.79/20,290.34
  6. Step 6: Final answer
    x = 16,421.00

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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.