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Finding the Fourth Proportional to 15,165.50, 20,928.54 and 8,878.01

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Solution

The fourth proportional to 15,165.50, 20,928.54 and 8,878.01 is: 12,251.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,165.50 : 20,928.54 = 8,878.01 : x
  2. Step 2: Convert to fraction form
    15,165.50/20,928.54 = 8,878.01/x
  3. Step 3: Cross multiply
    15,165.50x = 20,928.54 × 8,878.01
  4. Step 4: Simplify right side
    15,165.50x = 185,803,787.41
  5. Step 5: Solve for x
    x = 185,803,787.41/15,165.50
  6. Step 6: Final answer
    x = 12,251.74

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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.