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Finding the Fourth Proportional to 8,778.57, 13,159.53 and 2,931.03

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Solution

The fourth proportional to 8,778.57, 13,159.53 and 2,931.03 is: 4,393.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.57 : 13,159.53 = 2,931.03 : x
  2. Step 2: Convert to fraction form
    8,778.57/13,159.53 = 2,931.03/x
  3. Step 3: Cross multiply
    8,778.57x = 13,159.53 × 2,931.03
  4. Step 4: Simplify right side
    8,778.57x = 38,570,977.22
  5. Step 5: Solve for x
    x = 38,570,977.22/8,778.57
  6. Step 6: Final answer
    x = 4,393.77

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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.