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Finding the Fourth Proportional to 12,458.78, 18,700.64 and 8,952.90

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Solution

The fourth proportional to 12,458.78, 18,700.64 and 8,952.90 is: 13,438.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,458.78 : 18,700.64 = 8,952.90 : x
  2. Step 2: Convert to fraction form
    12,458.78/18,700.64 = 8,952.90/x
  3. Step 3: Cross multiply
    12,458.78x = 18,700.64 × 8,952.90
  4. Step 4: Simplify right side
    12,458.78x = 167,424,959.86
  5. Step 5: Solve for x
    x = 167,424,959.86/12,458.78
  6. Step 6: Final answer
    x = 13,438.31

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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.