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Finding the Fourth Proportional to 21,885.48, 32,816.88 and 13,004.64

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Solution

The fourth proportional to 21,885.48, 32,816.88 and 13,004.64 is: 19,500.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.48 : 32,816.88 = 13,004.64 : x
  2. Step 2: Convert to fraction form
    21,885.48/32,816.88 = 13,004.64/x
  3. Step 3: Cross multiply
    21,885.48x = 32,816.88 × 13,004.64
  4. Step 4: Simplify right side
    21,885.48x = 426,771,710.32
  5. Step 5: Solve for x
    x = 426,771,710.32/21,885.48
  6. Step 6: Final answer
    x = 19,500.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.