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Finding the Fourth Proportional to 14,914.40, 20,572.80 and 10,728.32

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Solution

The fourth proportional to 14,914.40, 20,572.80 and 10,728.32 is: 14,798.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,914.40 : 20,572.80 = 10,728.32 : x
  2. Step 2: Convert to fraction form
    14,914.40/20,572.80 = 10,728.32/x
  3. Step 3: Cross multiply
    14,914.40x = 20,572.80 × 10,728.32
  4. Step 4: Simplify right side
    14,914.40x = 220,711,581.70
  5. Step 5: Solve for x
    x = 220,711,581.70/14,914.40
  6. Step 6: Final answer
    x = 14,798.56

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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.