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Finding the Fourth Proportional to 28,673.81, 42,993.24 and 12,875.77

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Solution

The fourth proportional to 28,673.81, 42,993.24 and 12,875.77 is: 19,305.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,673.81 : 42,993.24 = 12,875.77 : x
  2. Step 2: Convert to fraction form
    28,673.81/42,993.24 = 12,875.77/x
  3. Step 3: Cross multiply
    28,673.81x = 42,993.24 × 12,875.77
  4. Step 4: Simplify right side
    28,673.81x = 553,571,069.79
  5. Step 5: Solve for x
    x = 553,571,069.79/28,673.81
  6. Step 6: Final answer
    x = 19,305.81

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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.