Home / 21,253.42-29,328.93-11,821.78

Finding the Fourth Proportional to 21,253.42, 29,328.93 and 11,821.78

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Solution

The fourth proportional to 21,253.42, 29,328.93 and 11,821.78 is: 16,313.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.42 : 29,328.93 = 11,821.78 : x
  2. Step 2: Convert to fraction form
    21,253.42/29,328.93 = 11,821.78/x
  3. Step 3: Cross multiply
    21,253.42x = 29,328.93 × 11,821.78
  4. Step 4: Simplify right side
    21,253.42x = 346,720,158.10
  5. Step 5: Solve for x
    x = 346,720,158.10/21,253.42
  6. Step 6: Final answer
    x = 16,313.62

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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.