Home / 19,715.40-29,558.52-9,315

Finding the Fourth Proportional to 19,715.40, 29,558.52 and 9,315

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Solution

The fourth proportional to 19,715.40, 29,558.52 and 9,315 is: 13,965.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,715.40 : 29,558.52 = 9,315 : x
  2. Step 2: Convert to fraction form
    19,715.40/29,558.52 = 9,315/x
  3. Step 3: Cross multiply
    19,715.40x = 29,558.52 × 9,315
  4. Step 4: Simplify right side
    19,715.40x = 275,337,613.80
  5. Step 5: Solve for x
    x = 275,337,613.80/19,715.40
  6. Step 6: Final answer
    x = 13,965.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.