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Finding the Fourth Proportional to 13,337.60, 19,980.80 and 7,859.20

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Solution

The fourth proportional to 13,337.60, 19,980.80 and 7,859.20 is: 11,773.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,337.60 : 19,980.80 = 7,859.20 : x
  2. Step 2: Convert to fraction form
    13,337.60/19,980.80 = 7,859.20/x
  3. Step 3: Cross multiply
    13,337.60x = 19,980.80 × 7,859.20
  4. Step 4: Simplify right side
    13,337.60x = 157,033,103.36
  5. Step 5: Solve for x
    x = 157,033,103.36/13,337.60
  6. Step 6: Final answer
    x = 11,773.72

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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.