Home / 18,905.60-28,358.40-13,000.70

Finding the Fourth Proportional to 18,905.60, 28,358.40 and 13,000.70

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Solution

The fourth proportional to 18,905.60, 28,358.40 and 13,000.70 is: 19,501.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.60 : 28,358.40 = 13,000.70 : x
  2. Step 2: Convert to fraction form
    18,905.60/28,358.40 = 13,000.70/x
  3. Step 3: Cross multiply
    18,905.60x = 28,358.40 × 13,000.70
  4. Step 4: Simplify right side
    18,905.60x = 368,679,050.88
  5. Step 5: Solve for x
    x = 368,679,050.88/18,905.60
  6. Step 6: Final answer
    x = 19,501.05

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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.