Home / 10,130.05-15,190.21-4,788.78

Finding the Fourth Proportional to 10,130.05, 15,190.21 and 4,788.78

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Solution

The fourth proportional to 10,130.05, 15,190.21 and 4,788.78 is: 7,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,130.05 : 15,190.21 = 4,788.78 : x
  2. Step 2: Convert to fraction form
    10,130.05/15,190.21 = 4,788.78/x
  3. Step 3: Cross multiply
    10,130.05x = 15,190.21 × 4,788.78
  4. Step 4: Simplify right side
    10,130.05x = 72,742,495.93
  5. Step 5: Solve for x
    x = 72,742,495.93/10,130.05
  6. Step 6: Final answer
    x = 7,180.87

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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.