Home / 20,688.41-28,549.17-11,256.77

Finding the Fourth Proportional to 20,688.41, 28,549.17 and 11,256.77

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Solution

The fourth proportional to 20,688.41, 28,549.17 and 11,256.77 is: 15,533.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.41 : 28,549.17 = 11,256.77 : x
  2. Step 2: Convert to fraction form
    20,688.41/28,549.17 = 11,256.77/x
  3. Step 3: Cross multiply
    20,688.41x = 28,549.17 × 11,256.77
  4. Step 4: Simplify right side
    20,688.41x = 321,371,440.38
  5. Step 5: Solve for x
    x = 321,371,440.38/20,688.41
  6. Step 6: Final answer
    x = 15,533.89

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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.