Home / 20,800.64-28,703.20-12,302.24

Finding the Fourth Proportional to 20,800.64, 28,703.20 and 12,302.24

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Solution

The fourth proportional to 20,800.64, 28,703.20 and 12,302.24 is: 16,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.64 : 28,703.20 = 12,302.24 : x
  2. Step 2: Convert to fraction form
    20,800.64/28,703.20 = 12,302.24/x
  3. Step 3: Cross multiply
    20,800.64x = 28,703.20 × 12,302.24
  4. Step 4: Simplify right side
    20,800.64x = 353,113,655.17
  5. Step 5: Solve for x
    x = 353,113,655.17/20,800.64
  6. Step 6: Final answer
    x = 16,976.10

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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.