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Finding the Fourth Proportional to 19,689.79, 29,534.80 and 4,898.71

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Solution

The fourth proportional to 19,689.79, 29,534.80 and 4,898.71 is: 7,348.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,689.79 : 29,534.80 = 4,898.71 : x
  2. Step 2: Convert to fraction form
    19,689.79/29,534.80 = 4,898.71/x
  3. Step 3: Cross multiply
    19,689.79x = 29,534.80 × 4,898.71
  4. Step 4: Simplify right side
    19,689.79x = 144,682,395.61
  5. Step 5: Solve for x
    x = 144,682,395.61/19,689.79
  6. Step 6: Final answer
    x = 7,348.09

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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.