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Finding the Fourth Proportional to 22,988.84, 31,724.25 and 12,779.48

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Solution

The fourth proportional to 22,988.84, 31,724.25 and 12,779.48 is: 17,635.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,988.84 : 31,724.25 = 12,779.48 : x
  2. Step 2: Convert to fraction form
    22,988.84/31,724.25 = 12,779.48/x
  3. Step 3: Cross multiply
    22,988.84x = 31,724.25 × 12,779.48
  4. Step 4: Simplify right side
    22,988.84x = 405,419,259.77
  5. Step 5: Solve for x
    x = 405,419,259.77/22,988.84
  6. Step 6: Final answer
    x = 17,635.49

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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.