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Finding the Fourth Proportional to 18,374.32, 25,357.08 and 10,821.16

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Solution

The fourth proportional to 18,374.32, 25,357.08 and 10,821.16 is: 14,933.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,374.32 : 25,357.08 = 10,821.16 : x
  2. Step 2: Convert to fraction form
    18,374.32/25,357.08 = 10,821.16/x
  3. Step 3: Cross multiply
    18,374.32x = 25,357.08 × 10,821.16
  4. Step 4: Simplify right side
    18,374.32x = 274,393,019.81
  5. Step 5: Solve for x
    x = 274,393,019.81/18,374.32
  6. Step 6: Final answer
    x = 14,933.51

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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.