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Finding the Fourth Proportional to 14,001.60, 20,980.80 and 11,798.40

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Solution

The fourth proportional to 14,001.60, 20,980.80 and 11,798.40 is: 17,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,001.60 : 20,980.80 = 11,798.40 : x
  2. Step 2: Convert to fraction form
    14,001.60/20,980.80 = 11,798.40/x
  3. Step 3: Cross multiply
    14,001.60x = 20,980.80 × 11,798.40
  4. Step 4: Simplify right side
    14,001.60x = 247,539,870.72
  5. Step 5: Solve for x
    x = 247,539,870.72/14,001.60
  6. Step 6: Final answer
    x = 17,679.40

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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.