Home / 10,518.99-15,778.48-3,123.45

Finding the Fourth Proportional to 10,518.99, 15,778.48 and 3,123.45

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Solution

The fourth proportional to 10,518.99, 15,778.48 and 3,123.45 is: 4,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.99 : 15,778.48 = 3,123.45 : x
  2. Step 2: Convert to fraction form
    10,518.99/15,778.48 = 3,123.45/x
  3. Step 3: Cross multiply
    10,518.99x = 15,778.48 × 3,123.45
  4. Step 4: Simplify right side
    10,518.99x = 49,283,293.36
  5. Step 5: Solve for x
    x = 49,283,293.36/10,518.99
  6. Step 6: Final answer
    x = 4,685.17

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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.