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Finding the Fourth Proportional to 21,506.40, 32,259.60 and 9,218.40

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Solution

The fourth proportional to 21,506.40, 32,259.60 and 9,218.40 is: 13,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,506.40 : 32,259.60 = 9,218.40 : x
  2. Step 2: Convert to fraction form
    21,506.40/32,259.60 = 9,218.40/x
  3. Step 3: Cross multiply
    21,506.40x = 32,259.60 × 9,218.40
  4. Step 4: Simplify right side
    21,506.40x = 297,381,896.64
  5. Step 5: Solve for x
    x = 297,381,896.64/21,506.40
  6. Step 6: Final answer
    x = 13,827.60

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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.