Home / 21,648.60-29,878.08-12,699

Finding the Fourth Proportional to 21,648.60, 29,878.08 and 12,699

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Solution

The fourth proportional to 21,648.60, 29,878.08 and 12,699 is: 17,526.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,648.60 : 29,878.08 = 12,699 : x
  2. Step 2: Convert to fraction form
    21,648.60/29,878.08 = 12,699/x
  3. Step 3: Cross multiply
    21,648.60x = 29,878.08 × 12,699
  4. Step 4: Simplify right side
    21,648.60x = 379,421,737.92
  5. Step 5: Solve for x
    x = 379,421,737.92/21,648.60
  6. Step 6: Final answer
    x = 17,526.39

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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.