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Finding the Fourth Proportional to 19,447.61, 29,146.80 and 12,424.91

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Solution

The fourth proportional to 19,447.61, 29,146.80 and 12,424.91 is: 18,621.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,447.61 : 29,146.80 = 12,424.91 : x
  2. Step 2: Convert to fraction form
    19,447.61/29,146.80 = 12,424.91/x
  3. Step 3: Cross multiply
    19,447.61x = 29,146.80 × 12,424.91
  4. Step 4: Simplify right side
    19,447.61x = 362,146,221.05
  5. Step 5: Solve for x
    x = 362,146,221.05/19,447.61
  6. Step 6: Final answer
    x = 18,621.64

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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.