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Finding the Fourth Proportional to 28,215.22, 42,322.36 and 6,868.16

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Solution

The fourth proportional to 28,215.22, 42,322.36 and 6,868.16 is: 10,302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.22 : 42,322.36 = 6,868.16 : x
  2. Step 2: Convert to fraction form
    28,215.22/42,322.36 = 6,868.16/x
  3. Step 3: Cross multiply
    28,215.22x = 42,322.36 × 6,868.16
  4. Step 4: Simplify right side
    28,215.22x = 290,676,740.06
  5. Step 5: Solve for x
    x = 290,676,740.06/28,215.22
  6. Step 6: Final answer
    x = 10,302.13

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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.