Home / 5,415.84-8,123.78-1,720.66

Finding the Fourth Proportional to 5,415.84, 8,123.78 and 1,720.66

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Solution

The fourth proportional to 5,415.84, 8,123.78 and 1,720.66 is: 2,581.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.84 : 8,123.78 = 1,720.66 : x
  2. Step 2: Convert to fraction form
    5,415.84/8,123.78 = 1,720.66/x
  3. Step 3: Cross multiply
    5,415.84x = 8,123.78 × 1,720.66
  4. Step 4: Simplify right side
    5,415.84x = 13,978,263.29
  5. Step 5: Solve for x
    x = 13,978,263.29/5,415.84
  6. Step 6: Final answer
    x = 2,581.00

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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.