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Finding the Fourth Proportional to 28,417.91, 42,626.86 and 7,641.41

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Solution

The fourth proportional to 28,417.91, 42,626.86 and 7,641.41 is: 11,462.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,417.91 : 42,626.86 = 7,641.41 : x
  2. Step 2: Convert to fraction form
    28,417.91/42,626.86 = 7,641.41/x
  3. Step 3: Cross multiply
    28,417.91x = 42,626.86 × 7,641.41
  4. Step 4: Simplify right side
    28,417.91x = 325,729,082.03
  5. Step 5: Solve for x
    x = 325,729,082.03/28,417.91
  6. Step 6: Final answer
    x = 11,462.11

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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.