Home / 10,905.60-16,358.40-7,187.70

Finding the Fourth Proportional to 10,905.60, 16,358.40 and 7,187.70

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Solution

The fourth proportional to 10,905.60, 16,358.40 and 7,187.70 is: 10,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.60 : 16,358.40 = 7,187.70 : x
  2. Step 2: Convert to fraction form
    10,905.60/16,358.40 = 7,187.70/x
  3. Step 3: Cross multiply
    10,905.60x = 16,358.40 × 7,187.70
  4. Step 4: Simplify right side
    10,905.60x = 117,579,271.68
  5. Step 5: Solve for x
    x = 117,579,271.68/10,905.60
  6. Step 6: Final answer
    x = 10,781.55

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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.