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Finding the Fourth Proportional to 21,901.90, 32,857.41 and 7,111.12

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Solution

The fourth proportional to 21,901.90, 32,857.41 and 7,111.12 is: 10,668.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,901.90 : 32,857.41 = 7,111.12 : x
  2. Step 2: Convert to fraction form
    21,901.90/32,857.41 = 7,111.12/x
  3. Step 3: Cross multiply
    21,901.90x = 32,857.41 × 7,111.12
  4. Step 4: Simplify right side
    21,901.90x = 233,652,985.40
  5. Step 5: Solve for x
    x = 233,652,985.40/21,901.90
  6. Step 6: Final answer
    x = 10,668.16

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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.