Home / 20,387.48-28,133.06-11,433.76

Finding the Fourth Proportional to 20,387.48, 28,133.06 and 11,433.76

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Solution

The fourth proportional to 20,387.48, 28,133.06 and 11,433.76 is: 15,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.48 : 28,133.06 = 11,433.76 : x
  2. Step 2: Convert to fraction form
    20,387.48/28,133.06 = 11,433.76/x
  3. Step 3: Cross multiply
    20,387.48x = 28,133.06 × 11,433.76
  4. Step 4: Simplify right side
    20,387.48x = 321,666,656.11
  5. Step 5: Solve for x
    x = 321,666,656.11/20,387.48
  6. Step 6: Final answer
    x = 15,777.66

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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.