Home / 20,548.31-28,356.64-11,116.87

Finding the Fourth Proportional to 20,548.31, 28,356.64 and 11,116.87

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Solution

The fourth proportional to 20,548.31, 28,356.64 and 11,116.87 is: 15,341.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,548.31 : 28,356.64 = 11,116.87 : x
  2. Step 2: Convert to fraction form
    20,548.31/28,356.64 = 11,116.87/x
  3. Step 3: Cross multiply
    20,548.31x = 28,356.64 × 11,116.87
  4. Step 4: Simplify right side
    20,548.31x = 315,236,981.83
  5. Step 5: Solve for x
    x = 315,236,981.83/20,548.31
  6. Step 6: Final answer
    x = 15,341.26

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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.