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Finding the Fourth Proportional to 21,504.80, 32,184.30 and 18,880.40

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Solution

The fourth proportional to 21,504.80, 32,184.30 and 18,880.40 is: 28,256.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,504.80 : 32,184.30 = 18,880.40 : x
  2. Step 2: Convert to fraction form
    21,504.80/32,184.30 = 18,880.40/x
  3. Step 3: Cross multiply
    21,504.80x = 32,184.30 × 18,880.40
  4. Step 4: Simplify right side
    21,504.80x = 607,652,457.72
  5. Step 5: Solve for x
    x = 607,652,457.72/21,504.80
  6. Step 6: Final answer
    x = 28,256.60

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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.