Home / 20,558.89-28,372.55-11,603.13

Finding the Fourth Proportional to 20,558.89, 28,372.55 and 11,603.13

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Solution

The fourth proportional to 20,558.89, 28,372.55 and 11,603.13 is: 16,013.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.89 : 28,372.55 = 11,603.13 : x
  2. Step 2: Convert to fraction form
    20,558.89/28,372.55 = 11,603.13/x
  3. Step 3: Cross multiply
    20,558.89x = 28,372.55 × 11,603.13
  4. Step 4: Simplify right side
    20,558.89x = 329,210,386.08
  5. Step 5: Solve for x
    x = 329,210,386.08/20,558.89
  6. Step 6: Final answer
    x = 16,013.04

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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.