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Finding the Fourth Proportional to 21,603.94, 32,405.91 and 5,187.94

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Solution

The fourth proportional to 21,603.94, 32,405.91 and 5,187.94 is: 7,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.94 : 32,405.91 = 5,187.94 : x
  2. Step 2: Convert to fraction form
    21,603.94/32,405.91 = 5,187.94/x
  3. Step 3: Cross multiply
    21,603.94x = 32,405.91 × 5,187.94
  4. Step 4: Simplify right side
    21,603.94x = 168,119,816.26
  5. Step 5: Solve for x
    x = 168,119,816.26/21,603.94
  6. Step 6: Final answer
    x = 7,781.91

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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.