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Finding the Fourth Proportional to 19,307.92, 28,961.88 and 12,426.16

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Solution

The fourth proportional to 19,307.92, 28,961.88 and 12,426.16 is: 18,639.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,307.92 : 28,961.88 = 12,426.16 : x
  2. Step 2: Convert to fraction form
    19,307.92/28,961.88 = 12,426.16/x
  3. Step 3: Cross multiply
    19,307.92x = 28,961.88 × 12,426.16
  4. Step 4: Simplify right side
    19,307.92x = 359,884,954.78
  5. Step 5: Solve for x
    x = 359,884,954.78/19,307.92
  6. Step 6: Final answer
    x = 18,639.24

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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.