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Finding the Fourth Proportional to 21,603.84, 32,412.48 and 18,340.80

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Solution

The fourth proportional to 21,603.84, 32,412.48 and 18,340.80 is: 27,516.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.84 : 32,412.48 = 18,340.80 : x
  2. Step 2: Convert to fraction form
    21,603.84/32,412.48 = 18,340.80/x
  3. Step 3: Cross multiply
    21,603.84x = 32,412.48 × 18,340.80
  4. Step 4: Simplify right side
    21,603.84x = 594,470,813.18
  5. Step 5: Solve for x
    x = 594,470,813.18/21,603.84
  6. Step 6: Final answer
    x = 27,516.91

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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.