Home / 20,856.84-28,773.63-12,885.24

Finding the Fourth Proportional to 20,856.84, 28,773.63 and 12,885.24

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Solution

The fourth proportional to 20,856.84, 28,773.63 and 12,885.24 is: 17,776.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.84 : 28,773.63 = 12,885.24 : x
  2. Step 2: Convert to fraction form
    20,856.84/28,773.63 = 12,885.24/x
  3. Step 3: Cross multiply
    20,856.84x = 28,773.63 × 12,885.24
  4. Step 4: Simplify right side
    20,856.84x = 370,755,128.22
  5. Step 5: Solve for x
    x = 370,755,128.22/20,856.84
  6. Step 6: Final answer
    x = 17,776.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.