Home / 20,530.78-28,332.50-11,099.34

Finding the Fourth Proportional to 20,530.78, 28,332.50 and 11,099.34

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Solution

The fourth proportional to 20,530.78, 28,332.50 and 11,099.34 is: 15,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.78 : 28,332.50 = 11,099.34 : x
  2. Step 2: Convert to fraction form
    20,530.78/28,332.50 = 11,099.34/x
  3. Step 3: Cross multiply
    20,530.78x = 28,332.50 × 11,099.34
  4. Step 4: Simplify right side
    20,530.78x = 314,471,995.05
  5. Step 5: Solve for x
    x = 314,471,995.05/20,530.78
  6. Step 6: Final answer
    x = 15,317.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.