Home / 13,749.60-20,624.40-9,890.40

Finding the Fourth Proportional to 13,749.60, 20,624.40 and 9,890.40

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Solution

The fourth proportional to 13,749.60, 20,624.40 and 9,890.40 is: 14,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.60 : 20,624.40 = 9,890.40 : x
  2. Step 2: Convert to fraction form
    13,749.60/20,624.40 = 9,890.40/x
  3. Step 3: Cross multiply
    13,749.60x = 20,624.40 × 9,890.40
  4. Step 4: Simplify right side
    13,749.60x = 203,983,565.76
  5. Step 5: Solve for x
    x = 203,983,565.76/13,749.60
  6. Step 6: Final answer
    x = 14,835.60

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Similar ratio
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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.