Home / 20,778.60-31,164.30-7,624.20

Finding the Fourth Proportional to 20,778.60, 31,164.30 and 7,624.20

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Solution

The fourth proportional to 20,778.60, 31,164.30 and 7,624.20 is: 11,434.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.60 : 31,164.30 = 7,624.20 : x
  2. Step 2: Convert to fraction form
    20,778.60/31,164.30 = 7,624.20/x
  3. Step 3: Cross multiply
    20,778.60x = 31,164.30 × 7,624.20
  4. Step 4: Simplify right side
    20,778.60x = 237,602,856.06
  5. Step 5: Solve for x
    x = 237,602,856.06/20,778.60
  6. Step 6: Final answer
    x = 11,434.98

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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.