Home / 21,389.85-29,487.11-14,664.83

Finding the Fourth Proportional to 21,389.85, 29,487.11 and 14,664.83

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Solution

The fourth proportional to 21,389.85, 29,487.11 and 14,664.83 is: 20,216.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.85 : 29,487.11 = 14,664.83 : x
  2. Step 2: Convert to fraction form
    21,389.85/29,487.11 = 14,664.83/x
  3. Step 3: Cross multiply
    21,389.85x = 29,487.11 × 14,664.83
  4. Step 4: Simplify right side
    21,389.85x = 432,423,344.57
  5. Step 5: Solve for x
    x = 432,423,344.57/21,389.85
  6. Step 6: Final answer
    x = 20,216.29

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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.