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Finding the Fourth Proportional to 19,423.20, 29,062.80 and 14,239.20

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Solution

The fourth proportional to 19,423.20, 29,062.80 and 14,239.20 is: 21,306.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,423.20 : 29,062.80 = 14,239.20 : x
  2. Step 2: Convert to fraction form
    19,423.20/29,062.80 = 14,239.20/x
  3. Step 3: Cross multiply
    19,423.20x = 29,062.80 × 14,239.20
  4. Step 4: Simplify right side
    19,423.20x = 413,831,021.76
  5. Step 5: Solve for x
    x = 413,831,021.76/19,423.20
  6. Step 6: Final answer
    x = 21,306.02

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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.