Home / 21,513.08-29,690.16-12,438.83

Finding the Fourth Proportional to 21,513.08, 29,690.16 and 12,438.83

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Solution

The fourth proportional to 21,513.08, 29,690.16 and 12,438.83 is: 17,166.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.08 : 29,690.16 = 12,438.83 : x
  2. Step 2: Convert to fraction form
    21,513.08/29,690.16 = 12,438.83/x
  3. Step 3: Cross multiply
    21,513.08x = 29,690.16 × 12,438.83
  4. Step 4: Simplify right side
    21,513.08x = 369,310,950.46
  5. Step 5: Solve for x
    x = 369,310,950.46/21,513.08
  6. Step 6: Final answer
    x = 17,166.81

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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.