Home / 20,516.08-28,312.32-12,965.77

Finding the Fourth Proportional to 20,516.08, 28,312.32 and 12,965.77

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Solution

The fourth proportional to 20,516.08, 28,312.32 and 12,965.77 is: 17,892.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.08 : 28,312.32 = 12,965.77 : x
  2. Step 2: Convert to fraction form
    20,516.08/28,312.32 = 12,965.77/x
  3. Step 3: Cross multiply
    20,516.08x = 28,312.32 × 12,965.77
  4. Step 4: Simplify right side
    20,516.08x = 367,090,822.90
  5. Step 5: Solve for x
    x = 367,090,822.90/20,516.08
  6. Step 6: Final answer
    x = 17,892.83

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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.