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Finding the Fourth Proportional to 15,532.50, 21,433.50 and 8,818.41

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Solution

The fourth proportional to 15,532.50, 21,433.50 and 8,818.41 is: 12,168.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,532.50 : 21,433.50 = 8,818.41 : x
  2. Step 2: Convert to fraction form
    15,532.50/21,433.50 = 8,818.41/x
  3. Step 3: Cross multiply
    15,532.50x = 21,433.50 × 8,818.41
  4. Step 4: Simplify right side
    15,532.50x = 189,009,390.74
  5. Step 5: Solve for x
    x = 189,009,390.74/15,532.50
  6. Step 6: Final answer
    x = 12,168.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.