Home / 28,455.84-42,690.78-11,810.88

Finding the Fourth Proportional to 28,455.84, 42,690.78 and 11,810.88

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Solution

The fourth proportional to 28,455.84, 42,690.78 and 11,810.88 is: 17,719.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.84 : 42,690.78 = 11,810.88 : x
  2. Step 2: Convert to fraction form
    28,455.84/42,690.78 = 11,810.88/x
  3. Step 3: Cross multiply
    28,455.84x = 42,690.78 × 11,810.88
  4. Step 4: Simplify right side
    28,455.84x = 504,215,679.69
  5. Step 5: Solve for x
    x = 504,215,679.69/28,455.84
  6. Step 6: Final answer
    x = 17,719.23

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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.