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Finding the Fourth Proportional to 21,751.40, 32,631.18 and 7,519.16

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Solution

The fourth proportional to 21,751.40, 32,631.18 and 7,519.16 is: 11,280.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.40 : 32,631.18 = 7,519.16 : x
  2. Step 2: Convert to fraction form
    21,751.40/32,631.18 = 7,519.16/x
  3. Step 3: Cross multiply
    21,751.40x = 32,631.18 × 7,519.16
  4. Step 4: Simplify right side
    21,751.40x = 245,359,063.41
  5. Step 5: Solve for x
    x = 245,359,063.41/21,751.40
  6. Step 6: Final answer
    x = 11,280.15

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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.