Home / 15,789.24-21,788.16-8,715.60

Finding the Fourth Proportional to 15,789.24, 21,788.16 and 8,715.60

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Solution

The fourth proportional to 15,789.24, 21,788.16 and 8,715.60 is: 12,026.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.24 : 21,788.16 = 8,715.60 : x
  2. Step 2: Convert to fraction form
    15,789.24/21,788.16 = 8,715.60/x
  3. Step 3: Cross multiply
    15,789.24x = 21,788.16 × 8,715.60
  4. Step 4: Simplify right side
    15,789.24x = 189,896,887.30
  5. Step 5: Solve for x
    x = 189,896,887.30/15,789.24
  6. Step 6: Final answer
    x = 12,026.98

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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.