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Finding the Fourth Proportional to 16,762.40, 25,114.80 and 7,978.40

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Solution

The fourth proportional to 16,762.40, 25,114.80 and 7,978.40 is: 11,953.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,762.40 : 25,114.80 = 7,978.40 : x
  2. Step 2: Convert to fraction form
    16,762.40/25,114.80 = 7,978.40/x
  3. Step 3: Cross multiply
    16,762.40x = 25,114.80 × 7,978.40
  4. Step 4: Simplify right side
    16,762.40x = 200,375,920.32
  5. Step 5: Solve for x
    x = 200,375,920.32/16,762.40
  6. Step 6: Final answer
    x = 11,953.89

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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.