Home / 20,321.94-28,045.36-11,368.91

Finding the Fourth Proportional to 20,321.94, 28,045.36 and 11,368.91

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Solution

The fourth proportional to 20,321.94, 28,045.36 and 11,368.91 is: 15,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.94 : 28,045.36 = 11,368.91 : x
  2. Step 2: Convert to fraction form
    20,321.94/28,045.36 = 11,368.91/x
  3. Step 3: Cross multiply
    20,321.94x = 28,045.36 × 11,368.91
  4. Step 4: Simplify right side
    20,321.94x = 318,845,132.30
  5. Step 5: Solve for x
    x = 318,845,132.30/20,321.94
  6. Step 6: Final answer
    x = 15,689.70

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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.