Home / 20,393.51-28,140.38-11,440.98

Finding the Fourth Proportional to 20,393.51, 28,140.38 and 11,440.98

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Solution

The fourth proportional to 20,393.51, 28,140.38 and 11,440.98 is: 15,787.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.51 : 28,140.38 = 11,440.98 : x
  2. Step 2: Convert to fraction form
    20,393.51/28,140.38 = 11,440.98/x
  3. Step 3: Cross multiply
    20,393.51x = 28,140.38 × 11,440.98
  4. Step 4: Simplify right side
    20,393.51x = 321,953,510.47
  5. Step 5: Solve for x
    x = 321,953,510.47/20,393.51
  6. Step 6: Final answer
    x = 15,787.06

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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.