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Finding the Fourth Proportional to 29,639.76, 44,472.12 and 12,991.20

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Solution

The fourth proportional to 29,639.76, 44,472.12 and 12,991.20 is: 19,492.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,639.76 : 44,472.12 = 12,991.20 : x
  2. Step 2: Convert to fraction form
    29,639.76/44,472.12 = 12,991.20/x
  3. Step 3: Cross multiply
    29,639.76x = 44,472.12 × 12,991.20
  4. Step 4: Simplify right side
    29,639.76x = 577,746,205.34
  5. Step 5: Solve for x
    x = 577,746,205.34/29,639.76
  6. Step 6: Final answer
    x = 19,492.27

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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.