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Finding the Fourth Proportional to 8,931.83, 12,327.63 and 5,157.44

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Solution

The fourth proportional to 8,931.83, 12,327.63 and 5,157.44 is: 7,118.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.83 : 12,327.63 = 5,157.44 : x
  2. Step 2: Convert to fraction form
    8,931.83/12,327.63 = 5,157.44/x
  3. Step 3: Cross multiply
    8,931.83x = 12,327.63 × 5,157.44
  4. Step 4: Simplify right side
    8,931.83x = 63,579,012.07
  5. Step 5: Solve for x
    x = 63,579,012.07/8,931.83
  6. Step 6: Final answer
    x = 7,118.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.