Home / 21,715.46-29,967-12,155.60

Finding the Fourth Proportional to 21,715.46, 29,967 and 12,155.60

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Solution

The fourth proportional to 21,715.46, 29,967 and 12,155.60 is: 16,774.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.46 : 29,967 = 12,155.60 : x
  2. Step 2: Convert to fraction form
    21,715.46/29,967 = 12,155.60/x
  3. Step 3: Cross multiply
    21,715.46x = 29,967 × 12,155.60
  4. Step 4: Simplify right side
    21,715.46x = 364,266,865.20
  5. Step 5: Solve for x
    x = 364,266,865.20/21,715.46
  6. Step 6: Final answer
    x = 16,774.54

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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.