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Finding the Fourth Proportional to 8,586.72, 12,880.20 and 2,430.72

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Solution

The fourth proportional to 8,586.72, 12,880.20 and 2,430.72 is: 3,646.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.72 : 12,880.20 = 2,430.72 : x
  2. Step 2: Convert to fraction form
    8,586.72/12,880.20 = 2,430.72/x
  3. Step 3: Cross multiply
    8,586.72x = 12,880.20 × 2,430.72
  4. Step 4: Simplify right side
    8,586.72x = 31,308,159.74
  5. Step 5: Solve for x
    x = 31,308,159.74/8,586.72
  6. Step 6: Final answer
    x = 3,646.11

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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.