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Finding the Fourth Proportional to 12,345.80, 18,505.74 and 8,881.16

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Solution

The fourth proportional to 12,345.80, 18,505.74 and 8,881.16 is: 13,312.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.80 : 18,505.74 = 8,881.16 : x
  2. Step 2: Convert to fraction form
    12,345.80/18,505.74 = 8,881.16/x
  3. Step 3: Cross multiply
    12,345.80x = 18,505.74 × 8,881.16
  4. Step 4: Simplify right side
    12,345.80x = 164,352,437.86
  5. Step 5: Solve for x
    x = 164,352,437.86/12,345.80
  6. Step 6: Final answer
    x = 13,312.42

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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.