Home / 21,670.50-29,905.56-12,718.20

Finding the Fourth Proportional to 21,670.50, 29,905.56 and 12,718.20

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Solution

The fourth proportional to 21,670.50, 29,905.56 and 12,718.20 is: 17,551.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,670.50 : 29,905.56 = 12,718.20 : x
  2. Step 2: Convert to fraction form
    21,670.50/29,905.56 = 12,718.20/x
  3. Step 3: Cross multiply
    21,670.50x = 29,905.56 × 12,718.20
  4. Step 4: Simplify right side
    21,670.50x = 380,344,893.19
  5. Step 5: Solve for x
    x = 380,344,893.19/21,670.50
  6. Step 6: Final answer
    x = 17,551.27

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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.