Home / 20,712.08-28,582-11,280.56

Finding the Fourth Proportional to 20,712.08, 28,582 and 11,280.56

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Solution

The fourth proportional to 20,712.08, 28,582 and 11,280.56 is: 15,566.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.08 : 28,582 = 11,280.56 : x
  2. Step 2: Convert to fraction form
    20,712.08/28,582 = 11,280.56/x
  3. Step 3: Cross multiply
    20,712.08x = 28,582 × 11,280.56
  4. Step 4: Simplify right side
    20,712.08x = 322,420,965.92
  5. Step 5: Solve for x
    x = 322,420,965.92/20,712.08
  6. Step 6: Final answer
    x = 15,566.81

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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.