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Finding the Fourth Proportional to 21,385.58, 29,510.90 and 11,824.91

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Solution

The fourth proportional to 21,385.58, 29,510.90 and 11,824.91 is: 16,317.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.58 : 29,510.90 = 11,824.91 : x
  2. Step 2: Convert to fraction form
    21,385.58/29,510.90 = 11,824.91/x
  3. Step 3: Cross multiply
    21,385.58x = 29,510.90 × 11,824.91
  4. Step 4: Simplify right side
    21,385.58x = 348,963,839.86
  5. Step 5: Solve for x
    x = 348,963,839.86/21,385.58
  6. Step 6: Final answer
    x = 16,317.71

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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.