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Finding the Fourth Proportional to 12,615.62, 18,931.52 and 8,460.32

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Solution

The fourth proportional to 12,615.62, 18,931.52 and 8,460.32 is: 12,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.62 : 18,931.52 = 8,460.32 : x
  2. Step 2: Convert to fraction form
    12,615.62/18,931.52 = 8,460.32/x
  3. Step 3: Cross multiply
    12,615.62x = 18,931.52 × 8,460.32
  4. Step 4: Simplify right side
    12,615.62x = 160,166,643.78
  5. Step 5: Solve for x
    x = 160,166,643.78/12,615.62
  6. Step 6: Final answer
    x = 12,695.90

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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.