Home / 20,159.10-30,239.55-7,685.10

Finding the Fourth Proportional to 20,159.10, 30,239.55 and 7,685.10

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Solution

The fourth proportional to 20,159.10, 30,239.55 and 7,685.10 is: 11,527.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.10 : 30,239.55 = 7,685.10 : x
  2. Step 2: Convert to fraction form
    20,159.10/30,239.55 = 7,685.10/x
  3. Step 3: Cross multiply
    20,159.10x = 30,239.55 × 7,685.10
  4. Step 4: Simplify right side
    20,159.10x = 232,393,965.71
  5. Step 5: Solve for x
    x = 232,393,965.71/20,159.10
  6. Step 6: Final answer
    x = 11,527.99

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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.