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Finding the Fourth Proportional to 19,638.48, 29,482.68 and 11,862.48

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Solution

The fourth proportional to 19,638.48, 29,482.68 and 11,862.48 is: 17,808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,638.48 : 29,482.68 = 11,862.48 : x
  2. Step 2: Convert to fraction form
    19,638.48/29,482.68 = 11,862.48/x
  3. Step 3: Cross multiply
    19,638.48x = 29,482.68 × 11,862.48
  4. Step 4: Simplify right side
    19,638.48x = 349,737,701.85
  5. Step 5: Solve for x
    x = 349,737,701.85/19,638.48
  6. Step 6: Final answer
    x = 17,808.80

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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.