Home / 21,285.53-29,372.91-12,210.43

Finding the Fourth Proportional to 21,285.53, 29,372.91 and 12,210.43

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Solution

The fourth proportional to 21,285.53, 29,372.91 and 12,210.43 is: 16,849.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.53 : 29,372.91 = 12,210.43 : x
  2. Step 2: Convert to fraction form
    21,285.53/29,372.91 = 12,210.43/x
  3. Step 3: Cross multiply
    21,285.53x = 29,372.91 × 12,210.43
  4. Step 4: Simplify right side
    21,285.53x = 358,655,861.45
  5. Step 5: Solve for x
    x = 358,655,861.45/21,285.53
  6. Step 6: Final answer
    x = 16,849.75

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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.