Home / 21,320.08-31,990.92-14,380

Finding the Fourth Proportional to 21,320.08, 31,990.92 and 14,380

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Solution

The fourth proportional to 21,320.08, 31,990.92 and 14,380 is: 21,577.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.08 : 31,990.92 = 14,380 : x
  2. Step 2: Convert to fraction form
    21,320.08/31,990.92 = 14,380/x
  3. Step 3: Cross multiply
    21,320.08x = 31,990.92 × 14,380
  4. Step 4: Simplify right side
    21,320.08x = 460,029,429.60
  5. Step 5: Solve for x
    x = 460,029,429.60/21,320.08
  6. Step 6: Final answer
    x = 21,577.28

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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.