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Finding the Fourth Proportional to 21,658.62, 29,889.03 and 12,706.32

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Solution

The fourth proportional to 21,658.62, 29,889.03 and 12,706.32 is: 17,534.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.62 : 29,889.03 = 12,706.32 : x
  2. Step 2: Convert to fraction form
    21,658.62/29,889.03 = 12,706.32/x
  3. Step 3: Cross multiply
    21,658.62x = 29,889.03 × 12,706.32
  4. Step 4: Simplify right side
    21,658.62x = 379,779,430.22
  5. Step 5: Solve for x
    x = 379,779,430.22/21,658.62
  6. Step 6: Final answer
    x = 17,534.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.