Home / 20,608.45-28,439.51-11,533.81

Finding the Fourth Proportional to 20,608.45, 28,439.51 and 11,533.81

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Solution

The fourth proportional to 20,608.45, 28,439.51 and 11,533.81 is: 15,916.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.45 : 28,439.51 = 11,533.81 : x
  2. Step 2: Convert to fraction form
    20,608.45/28,439.51 = 11,533.81/x
  3. Step 3: Cross multiply
    20,608.45x = 28,439.51 × 11,533.81
  4. Step 4: Simplify right side
    20,608.45x = 328,015,904.83
  5. Step 5: Solve for x
    x = 328,015,904.83/20,608.45
  6. Step 6: Final answer
    x = 15,916.57

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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.