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Finding the Fourth Proportional to 19,671.64, 29,490.18 and 7,356.76

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Solution

The fourth proportional to 19,671.64, 29,490.18 and 7,356.76 is: 11,028.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.64 : 29,490.18 = 7,356.76 : x
  2. Step 2: Convert to fraction form
    19,671.64/29,490.18 = 7,356.76/x
  3. Step 3: Cross multiply
    19,671.64x = 29,490.18 × 7,356.76
  4. Step 4: Simplify right side
    19,671.64x = 216,952,176.62
  5. Step 5: Solve for x
    x = 216,952,176.62/19,671.64
  6. Step 6: Final answer
    x = 11,028.68

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1.5x scale

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.