Home / 20,688.08-28,549.52-11,256.56

Finding the Fourth Proportional to 20,688.08, 28,549.52 and 11,256.56

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Solution

The fourth proportional to 20,688.08, 28,549.52 and 11,256.56 is: 15,534.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.08 : 28,549.52 = 11,256.56 : x
  2. Step 2: Convert to fraction form
    20,688.08/28,549.52 = 11,256.56/x
  3. Step 3: Cross multiply
    20,688.08x = 28,549.52 × 11,256.56
  4. Step 4: Simplify right side
    20,688.08x = 321,369,384.85
  5. Step 5: Solve for x
    x = 321,369,384.85/20,688.08
  6. Step 6: Final answer
    x = 15,534.04

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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.