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Finding the Fourth Proportional to 20,482.80, 30,724.20 and 14,607.60

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Solution

The fourth proportional to 20,482.80, 30,724.20 and 14,607.60 is: 21,911.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.80 : 30,724.20 = 14,607.60 : x
  2. Step 2: Convert to fraction form
    20,482.80/30,724.20 = 14,607.60/x
  3. Step 3: Cross multiply
    20,482.80x = 30,724.20 × 14,607.60
  4. Step 4: Simplify right side
    20,482.80x = 448,806,823.92
  5. Step 5: Solve for x
    x = 448,806,823.92/20,482.80
  6. Step 6: Final answer
    x = 21,911.40

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Similar ratio
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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.