Home / 28,533.82-39,390.40-18,989.59

Finding the Fourth Proportional to 28,533.82, 39,390.40 and 18,989.59

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Solution

The fourth proportional to 28,533.82, 39,390.40 and 18,989.59 is: 26,214.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,533.82 : 39,390.40 = 18,989.59 : x
  2. Step 2: Convert to fraction form
    28,533.82/39,390.40 = 18,989.59/x
  3. Step 3: Cross multiply
    28,533.82x = 39,390.40 × 18,989.59
  4. Step 4: Simplify right side
    28,533.82x = 748,007,545.05
  5. Step 5: Solve for x
    x = 748,007,545.05/28,533.82
  6. Step 6: Final answer
    x = 26,214.77

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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.