Home / 20,392.10-28,139.21-11,437.86

Finding the Fourth Proportional to 20,392.10, 28,139.21 and 11,437.86

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Solution

The fourth proportional to 20,392.10, 28,139.21 and 11,437.86 is: 15,783.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.10 : 28,139.21 = 11,437.86 : x
  2. Step 2: Convert to fraction form
    20,392.10/28,139.21 = 11,437.86/x
  3. Step 3: Cross multiply
    20,392.10x = 28,139.21 × 11,437.86
  4. Step 4: Simplify right side
    20,392.10x = 321,852,293.52
  5. Step 5: Solve for x
    x = 321,852,293.52/20,392.10
  6. Step 6: Final answer
    x = 15,783.18

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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.