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Finding the Fourth Proportional to 21,568.64, 29,762.08 and 13,607.84

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Solution

The fourth proportional to 21,568.64, 29,762.08 and 13,607.84 is: 18,777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,568.64 : 29,762.08 = 13,607.84 : x
  2. Step 2: Convert to fraction form
    21,568.64/29,762.08 = 13,607.84/x
  3. Step 3: Cross multiply
    21,568.64x = 29,762.08 × 13,607.84
  4. Step 4: Simplify right side
    21,568.64x = 404,997,622.71
  5. Step 5: Solve for x
    x = 404,997,622.71/21,568.64
  6. Step 6: Final answer
    x = 18,777.15

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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.