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Finding the Fourth Proportional to 8,762.81, 13,139.36 and 2,916.23

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Solution

The fourth proportional to 8,762.81, 13,139.36 and 2,916.23 is: 4,372.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.81 : 13,139.36 = 2,916.23 : x
  2. Step 2: Convert to fraction form
    8,762.81/13,139.36 = 2,916.23/x
  3. Step 3: Cross multiply
    8,762.81x = 13,139.36 × 2,916.23
  4. Step 4: Simplify right side
    8,762.81x = 38,317,381.23
  5. Step 5: Solve for x
    x = 38,317,381.23/8,762.81
  6. Step 6: Final answer
    x = 4,372.73

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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.