Home / 20,690.58-31,008.18-7,530.48

Finding the Fourth Proportional to 20,690.58, 31,008.18 and 7,530.48

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Solution

The fourth proportional to 20,690.58, 31,008.18 and 7,530.48 is: 11,285.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.58 : 31,008.18 = 7,530.48 : x
  2. Step 2: Convert to fraction form
    20,690.58/31,008.18 = 7,530.48/x
  3. Step 3: Cross multiply
    20,690.58x = 31,008.18 × 7,530.48
  4. Step 4: Simplify right side
    20,690.58x = 233,506,479.33
  5. Step 5: Solve for x
    x = 233,506,479.33/20,690.58
  6. Step 6: Final answer
    x = 11,285.64

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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.