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Finding the Fourth Proportional to 8,637.72, 12,935.81 and 4,928.70

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Solution

The fourth proportional to 8,637.72, 12,935.81 and 4,928.70 is: 7,381.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.72 : 12,935.81 = 4,928.70 : x
  2. Step 2: Convert to fraction form
    8,637.72/12,935.81 = 4,928.70/x
  3. Step 3: Cross multiply
    8,637.72x = 12,935.81 × 4,928.70
  4. Step 4: Simplify right side
    8,637.72x = 63,756,637.42
  5. Step 5: Solve for x
    x = 63,756,637.42/8,637.72
  6. Step 6: Final answer
    x = 7,381.19

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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.