Home / 20,159.88-30,235.20-7,681.32

Finding the Fourth Proportional to 20,159.88, 30,235.20 and 7,681.32

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Solution

The fourth proportional to 20,159.88, 30,235.20 and 7,681.32 is: 11,520.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.88 : 30,235.20 = 7,681.32 : x
  2. Step 2: Convert to fraction form
    20,159.88/30,235.20 = 7,681.32/x
  3. Step 3: Cross multiply
    20,159.88x = 30,235.20 × 7,681.32
  4. Step 4: Simplify right side
    20,159.88x = 232,246,246.46
  5. Step 5: Solve for x
    x = 232,246,246.46/20,159.88
  6. Step 6: Final answer
    x = 11,520.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.